• AAS determination of trace elements in lakewater and sedimentsLepane, Viia; Viitak, AnuISM'92 : 12-th International Symposium on Microchemical Techniques, Cordoba, Spain, 6-11 Sept. 1992 : abstracts1992
• Ametkondade äri Virumaa elanike arvelKallaste, T.; Hödrejärv, Helvi; Viitak, AnuLeninlik Lipp : EKP Kohtla-Järve Linnakomitee ja Rajoonikomitee, Kohtla-Järve Linna RSN ja Rajooni RSN häälekandja1988 / lk. [?] https://www.ester.ee/record=b1230683*est
• Ametkondade äri Virumaa elanike arvelKallaste, T.; Hödrejärv, Helvi; Viitak, AnuNoorte Hääl : ELKNÜ Keskkomitee häälekandja1988 / lk. [?] https://www.ester.ee/record=b1320792*est
• Analysis of trace elements in sewage sludgesViisimaa, Ludmilla; Lepane, Viia; Viitak, Anu; Viisimaa, MattiISM '92 : 12-th International Symposium on Microchemical Techniques, Cordoba, Spain, 6-11 Sept. 19921992
• Analytical monitoring of bivalent heavy metals in the biosphere of the area of phosphate fertilizer industryHödrejärv, Helvi; Viitak, Anu; Varandi, Merje; Lepane, ViiaEuropean Conference on Analytical Chemistry : Euroanalysis VII, Vienna, Austria, August 26-31, 1990 : book of abstracts. Vol. 11990
• Application of the ion chromatography for the speciation of the sample components in atom absorption spectroscopyKaljurand, Mihkel; Viitak, Anu; Treumann, Maili; Jakovleva, Irina; Hödrejärv, Helvi23rd Estonian Chemistry Days : abstracts of scientific conference1997 / p. 46
• Application of the ion chromatography for the speciation of the sample components in atom absorption spectroscopyKaljurand, Mihkel; Viitak, Anu; Treumann, Maili; Hödrejärv, HelviChimia1998 / 7/8, p. 343
• Arseeni ja seleeni määramine juustes AAS - leegita meetodil = Electrothermal AAS for the determination of arsenic and selenium in hairViitak, Anu; Treumann, MailiXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 17th Estonian Chemistry Days : abstracts of scientific conference1996 / lk. 227-228 https://www.ester.ee/record=b1070511*est
• Assessment of potential hazards during the process of house building in EstoniaBogovski, Sergei; Lang, Iina; Rjazanov, Vladislav; Muzõka, Vladimir; Tuulik, Viiu; Viitak, AnuInternational journal of environmental health research2007 / 2, p. 105-112
• Bioelemendid keskkonnatervise riskiteguritena Eestis : [ettekande teesid]Silla, Raiot; Viitak, Anu; Teoste, M.; Ostrat, A.Üle-eestiline teaduskonverents "Tervise edendamine Eestis", 17.-18. aprill 1997. a. : konverentsi ettekannete teesid1997 / lk. 54
• Biometallide sisaldus Eesti linnaelanike vereseerumisViitak, Anu; Muzõka, Vladimir; Bogovski, SergeiEesti Arst2004 / 9, lk. 631 https://artiklid.elnet.ee/record=b1047517*est
• Breast milk and serum selenium content in Finland, Estonia, St. Petersburg and KarelianKantola, M.; Mand, E.; Viitak, Anu; Tooming, M.; Juravskaja, J.; Vartiainen, T.; Purkunen, R.; Saarikoski, S.; Pasanen, M.International Conference on Quality and Safety Aspects of Food & Nutrition in Europe '95 : QSFNE, August 22-25, 1995, Helsinki, Finland : programme and book of abstracts1995 / l. P Q B07
• Breast milk and serum selenium levels in Finland, Estonia, St. Petersburg and KarelianKantola, M.; Vartiainen, T.; Mand, E.; Viitak, Anu; Tooming, M.; Juravskaja, J.; Purkunen, R.; Saarikoski, S.; Pasanen, M.Journal of trace elements in experimental medicine1995 / 2, p. 87
• Ca ja Mg sisaldused üliõpilaste vereseerumis sõltuvalt toitumisharjumistestViitak, Anu; Lahne, Riina; Vaarmann, Aini; Treumann, Maili; Friedenthal, Margus; Hödrejärv, Helvi; Lipre, EndlaXXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 160
• Can selenium levels act as a marker of colorectal cancer risk?Lener, Marcin R.; Kulp, Maria; Viitak, AnuBMC cancer2013 / p. 1-6 : ill
• Chemical analysis of temporal changes in the structure and quantity of organic biomolecules of lake sedimentsLepane, Viia; Makarõtševa, Natalja; Viitak, Anu; Alliksaar, TiiuInternational Humic Substances Society 11th Nordic-Baltic Symposium. Functioning of NOM in the Environment : Joensuu, Finland, June 10-13 : abstracts2007 / p. 42
• Chemical speciation analysis of micrometals in soilsHödrejärv, Helvi; Viitak, Anu; Vaarmann, AiniProceedings of the Estonian Academy of Sciences. Chemistry1995 / 2/3, p. 171-178: ill
• Co, Ni, Cu and Zn concentration in hair of childern of EstoniaViitak, AnuExtended abstracts of the Symposium "Environmental Analyse"1995 / p. 185-190: ill
• Comparative determination of microelements in Baltic seawater and brown algae samples by atomic absorption spectrometric and inductively coupled plasma methodsTruus, Kalle; Viitak, Anu; Vaher, Merike; Muinasmaa, Urmas; Paasrand, Keddy; Tuvikene, Rando; Levandi, TuuliProceedings of the Estonian Academy of Sciences. Chemistry2007 / 3, p. 122-133 : ill
• Comparison of eluents for lead and cadmium fractionation in waters by non-suppressed ion chromatography with UV and GFAAS detectionLepane, Viia; Viitak, Anu; Treumann, Maili; Kaljurand, MihkelBalaton Symposium'99 on High-Performance Separation Methods : September 1-3, 1999, Siofok, Hungary : book of abstracts1999 / p. P-152
• Complex investigation of composition of the brown alga Fucus vesiculosus (The Baltic Sea) by different instrumental methodsVaher, Merike; Truus, Kalle; Koel, Mihkel; Pehk, Tõnis; Taure, Imants; Viitak, AnuIMA'03 : 3rd International Conference : Instrumental Methods of Analysis Modern Trends and Applications : 23-27 September 2003, Thessaloniki, Greece : conference proceedings2003 / p. 238-240 : ill
• Comprehensive investigation of St.John's Worth (Hypernicum perforatum) : polyphenolic compounds, essential oils and metalsHelmja, Kati; Vaher, Merike; Orav, Anne; Viitak, Anu; Püssa, Tõnu; Kaljurand, Mihkel14th International Symposium on Separation Science : Primosten, Croatia, 30 Sept. - 3 Oct. 20082008 / p. 59
• A computerized flow injection analysis manifold for interference determination in flame atomic absorption spectrometryLahne, Riina; Viitak, Anu; Hödrejärv, Helvi; Treumann, Maili; Friedenthal, Margus; Kaljurand, MihkelProceedings of the Estonian Academy of Sciences. Chemistry2002 / p. 29-37 : ill
• Concentration of microelements in the biomedia between the mother and the newbornViitak, Anu; Hödrejärv, Helvi; Treumann, MailiProceedings of the Estonian Academy of Sciences. Chemistry1995 / 2/3, p. 212-217: ill
• Determination of metallic and non-metallic elements in coastal seawater and in algal biomass by atomic absorption spectrometry using colloidal palladium modifierViitak, Anu; Volynsky, Anatoly B.; Truus, Kalle; Vaher, Merike; Levandi, Tuuli4th International Conference, Instrumental Methods of Analysis Modern Trends and Applications2005 / p. 371
• Determination of selenium in body fluids of man by atomic absorption spectrometryViitak, Anu; Hödrejärv, HelviTallinna Tehnikaülikooli Toimetised1994 / lk. 58-67: ill
• Determination of silver in standard reference materials by cloud point extraction following atomic absorption spectrometryKilinc, Ersin; Lepane, Viia; Viitak, Anu; Gumgum, B.Euroanalysis XIV : Antwerp (Belgium), 9-14 September 2007 : book of abstracts2007 / p. 224
• Distribution of heavy metals in man and the environment in EstoniaHödrejärv, Helvi; Viitak, Anu; Ott, RomanKemia-kemi1990 / 10B, p. 995
• Eesti rannikumere pruunvetikad indikaatorina Läänemere toksiliste elementide reostuse hindamiselLevandi, Tuuli; Viitak, Anu; Truus, Kalle; Paasrand, Keddy; Tuvikene, Rando; Vaher, MerikeXXIX Eesti keemiapäevad : teaduskonverentsi ettekannete teesid = 29th Estonian Chemistry Days : abstracts of scientific conference2005 / lk. 56-57
• Eesti teadlased lähevad eurooplaste toidu kallale : [Anu Viitaki kommentaariga ja keemiainstituudi tööst toiduainete koostise uurimisel]Narusk, Agne; Viitak, AnuHEI = Hea Eesti Idee2009 / apr., lk. 30-32 : ill
• Eestlastel on liiga madal seleenitaseViitak, AnuÄripäev2018 / Terviseuudised, lk. 3
• Effect of selenium treatment on mineral nutrition, bulb size, and antioxidant properties of garlic (Allium sativum L.)Põldma, Priit; Tõnutare, Tõnu; Viitak, Anu; Luik, Anne; Moor, UlviJournal of agricultural and food chemistry2011 / p. 5498-5503 : ill
• Effects of drying on the gel strength and cation mobility of furcellaranFriedenthal, Margus; Eha, Kairit; Viitak, Anu; Lukas, Ave; Siimer, EnnInnovative food science & emerging technologies2001 / p. 275-279 : ill https://doi.org/10.1016/S1466-8564(00)00027-8
• Ekspressmeetod interferentide mõju uurimiseks AAS-isLahne, Riina; Kaljurand, Mihkel; Viitak, AnuXXV Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 25th Estonian Chemistry Days : abstracts of scientific conference1999 / lk. 67
• Electrothermal AAS for the determination of arsenic and selenium in hairViitak, Anu; Treumann, MailiProceedings of the Estonian Academy of Sciences. Chemistry1996 / 3/4, p. 91-96
• Fine-scale pattern of the decomposition, compaction and accumulation of organic matter in Sphagnum hummocks (Nigula bog, SW Estonia)Blinova, Irina; Ilomets, M.; Lukjanova, A.; Treumann, Maili; Viitak, AnuProc. 12th International Peat Congress : Tampere, Finland, 6-11 June, 20042004 / p. 972-976
• Heavy and biometals in EstoniaViitak, Anu; Hödrejärv, Helvi; Silla, Raiot; Reintam, LoitChemical data of plant, animal and human tissues as a basis of geomedical investigations1996 / p. 115-124
• Heavy metals in man in the area of cement factoryViitak, Anu; Hödrejärv, Helvi; Varandi, Merje; Lepane, Viia; Saare, L.International Symposium on Trace Elements in Health and Disease, Espoo, Finland, 5-8 June 1990 : abstracts1990 / p. 96
• Heavy metals in snow and some indicator plants in EstoniaPunning, Jaan-Mati; Zobel, Martin; Lillemets, S.; Trass, H.; Roosma, A.; Minayeva, O.; Saare, L.; Viitak, Anu; Hödrejärv, HelviProceedings of the Estonian Academy of Sciences. Ecology1991 / 1/2, p. 65-71
• Human biomonitoring in the oil shale industry area in Estonia—overview of earlier programmes and future perspectivesOrru, Hans; Viitak, Anu; Herodes, Koit; Veber, Triin; Lukk, MärtenFrontiers in public health2020 / art. 582114, 8 p. : ill https://doi.org/10.3389/fpubh.2020.582114 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS
• Identification of bioactive compounds in leaves and stems of Aegopodium podagraria by various analytical technicsOrav, Anne; Viitak, Anu; Helmja, Kati; Vaher, MerikeNoSSS2009 : 5th Conference on Separation and Related Techniques by Nordic Separation Science Society : 26-29 August, 2009, Tallinn University of Technology, Estonia : abstract book and program2009 / p. 144
• Identification of bioactive compounds in the leaves and stems of Aegopodium podagraria by various analytical techniquesOrav, Anne; Viitak, Anu; Vaher, MerikeProcedia chemistry2010 / p. 152-160 : ill
• Interaction of metal cations with different humic substances from sea and lake sedimentsÜbner, Monika; Treumann, Maili; Viitak, Anu; Lopp, MargusProceedings of the Estonian Academy of Sciences. Chemistry2005 / 1, p. 24-34 : ill
• Investigation of the stability of glutathione-metal complexes and related tetrapeptides-metal complexes using capillary electrophoresis, ETAAS and ICP-MSVaher, Merike; Viitak, Anu; Makarõtševa, Natalja; Muinasmaa, Urmas; Kaljurand, Mihkel16th International Symposium on Capillary Electroseparation Techniques : Catania, Italy, August 31-September 4, 2008 : book of abstracts2008 / p. 80
• Ioonkromatograafia kasutamine proovi spetsifitseerimiseks aatomabsorptsioonspektroskoopiasKaljurand, Mihkel; Viitak, Anu; Treumann, Maili; Jakovleva, Irina; Hödrejärv, HelviXXIII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid1997 / lk. 41
• Keemiline defitsiit : [mineraalelementide ja vitamiinide vaegusest lastel]Silla, Raiot; Viitak, AnuTervisekaitse 19951996 / lk. 86-91 : ill https://www.ester.ee/record=b1226408*est
• Kui saastunud on õhk Virumaal ja millised on tagajärjed? Ka seostest energeetikagaHödrejärv, Helvi; Kallaste, T.; Viitak, AnuRahva Hääl1988 / lk. [?] https://www.ester.ee/record=b1072826*est
• Kvaliteeditagamine analüütilises keemiasLeito, Ivo; Viitak, Anu2007 https://www.ester.ee/record=b2238181*est
• Mikroelementide biomonitooring lastelSilla, Raiot; Viitak, Anu; Teoste, MaimuEesti Arst1997 / 2, lk. 117-120
• Mikroelementide sisaldus ema ja vastsündinud lapse vahelises biokeskkonnasViitak, Anu; Hödrejärv, Helvi; Treumann, MailiXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 16th Estonian chemistry days : abstracts of scientific conference1995 / lk. 154-157
• Mineraalelementide sisaldus vere seerumis Eesti elanikkonnal sõltuvalt nende toitumisharjumusestViitak, Anu; Friedenthal, Margus; Tuulik, Viiu; Vaarmann, Aini; Treumann, Maili; Fuchs, K.; Lipre, Endla; Saarik, S.; Hödrejärv, HelviXXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 27th Estonian Chemistry Days : abstracts of scientific conference2001 / lk. 161
• Modificated methods for the determination of Ca in the milk and blood serum in the study of Ca metabolism in manViitak, Anu; Lahne, Riina; Hödrejärv, Helvi; Kaljurand, Mihkel; Friedenthal, Margus; Tuulik, ViiuEUROANALYSIS XI : European Conference on Analytical Chemistry : Lissabon, Portugal, September 3-8, 2000 : book of abstracts2001 / p. 256
• Monitoring of trace elements in EstoniaSilla, Raiot; Viitak, Anu; Teoste, M.International Symposium on Environmental Epidemiology in Central and Eastern Europe : Critical Issues for Improving Health : Smolenice, Slovak Republic, Sept. 24-27, 1997 : abstracts1997 / p. 38
• Multimethod analysis of organic constituents and selected metals in lake sediments and interstitial waterLepane, Viia; Makarõtševa, Natalja; Viitak, Anu; Alliksaar, Tiiu; Havel, J.Euroanalysis XIV : Antwerp (Belgium), 9-14 September 2007 : book of abstracts2007 / p. 112
• Off-line determination of trace silver in water samples and standard reference materials by cloud point extraction-atomic absorption spectrometryKilinc, Ersin; Lepane, Viia; Viitak, Anu; Gumgum, BahattinProceedings of the Estonian Academy of Sciences2009 / 3, p. 190-196
• Partition of trace metals between inorganic and organic matter fractions in sediment record from Lake PeipsiLepane, Viia; Morriset, Malvina; Viitak, Anu; Laane, Maile; Alliksaar, Tiiu12th Nordic-Baltic IHSS Symposium on Natural Organic Matter in Environment and Technology : Tallinn, Estonia, June 14-17, 2009 : program and abstracts2009 / p. 73
• Partitioning of metals between operational fractions in the sediment record from Lake PeipsiLepane, Viia; Morriset, Malvina; Viitak, Anu; Laane, Maile; Alliksaar, TiiuChemistry and ecology2010 / Suppl., p. 35-48 : ill https://doi.org/10.1080/02757540.2010.501031
• Pikaajaliste kutseekspressioonide toksiline toime ainevahetuseleMuzõka, Vladimir; Bogovski, Sergei; Pille, Viive; Viitak, Anu; Veidebaum, ToomasEesti Arst2004 / 9, lk. 620 https://artiklid.elnet.ee/record=b1047469*est
• Pinnases leiduvate mikrometallide keemiline ühendiliigitus-(speciation) analüüsHödrejärv, Helvi; Viitak, Anu; Vaarmann, AiniXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 16th Estonian chemistry days : abstracts of scientific conference1995 / lk. 24-26
• Plii ja kaadmium Eesti elukeskkonnas ja laste tervisSilla, Raiot; Teoste, M.; Ostrat, A.; Viitak, AnuTervisekaitse 1994 = Health protection 19941995 / lk. 95-100
• Poliitika ja majandus arenevad puhtas keskkonnas pareminiHödrejärv, Helvi; Viitak, AnuKaubaleht1992 / mai
• Properties of humic substances from the Baltic Sea and Lake Ermistu mudÜbner, Monika; Treumann, Maili; Viitak, Anu; Lopp, MargusJournal of soils and sediments2004 / 1, p. 24-29
• Raskemetallide foon ja bioakumulatsioon Põhja-EestisHödrejärv, Helvi; Viitak, Anu; Lepane, Viia; Vaarmann, Aini; Treumann, MailiKaasaegse ökoloogia probleemid. Alalhoidlik areng ja looduskeskne elulaad : Eesti VI ökoloogiakonverentsi lühiartiklid, Tartu, 24.-26. aprill 19941994 / lk. 120-124: ill
• Sedimentary record of heavy metals in Lake Rõuge Liinjärv, southern EstoniaLepane, Viia; Varvas, Mart; Viitak, Anu; Alliksaar, Tiiu; Heinsalu, AtkoEstonian journal of earth sciences2007 / 4, p. 221-232 : ill
• Segajate mõju uurimine Se sisalduse määramisel AAS elektrotermilisel meetodilSusi, Tiina; Viitak, Anu; Kruus, A.XXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 136
• Seleeni, vase ja tsingi sisalduse määramine eestlaste vereseerumisNeps, Triin; Viitak, Anu; Levandi, Tuuli; Pruus, K.; Lanno, Riin; Kantola, M.XXX Eesti keemiapäevad : teaduskonverentsi teesid = 30th Estonian Chemistry Days : abstracts of scientific conference2007 / lk. 102-103
• Selenium levels of EstoniansRauhamaa, Päivi; Kantola, Marjatta; Viitak, Anu; Kaasik, Aidula-Taie; Mussalo-Rauhamaa, HelenaEuropean journal of clinical nutrition2008 / 9, p. 1075-1078 http://dx.doi.org/10.1038/sj.ejcn.1602818
• Separation of interfering substances with ion chromatography on Pb and Cd determinations by flameless AASViitak, Anu; Lepane, ViiaInternational Conference Instrumental Methods of Analysis Modern Trends and Applications : 19-22 September 1999, Chalkidiki, Greece : conference proceedings. Volume II1999 / p. 563
• Separation of interfering substances with ion chromatography on Pb and Cd determinations by flameless AASKaljurand, Mihkel; Viitak, Anu; Lepane, Viia; Treumann, Maili24th Estonian Chemistry Days : abstracts of scientific conference1998 / p. 25
• Simple procedure for the determination of Cd, Pb, As and Se in biological samples by electrothermal atomic absorption spectrometry using colloidal Pd modifierViitak, Anu; Volynsky, Anatoly B.Talanta2006 / 4, p. 890-895 : ill https://www.sciencedirect.com/science/article/pii/S0039914006001330
• Simultaneous preconcentration and separation of Cr(III) and Cr(VI) using CE with AAS detectionKuldvee, Ruth; Viitak, Anu; Kaljurand, Mihkel15th International Symposium on Microscale Separations and Analysis HPCE, April 13-18, 2002, Stockholm : abstracts2002 / p. 266
• Some chemical characteristics of sewage sludges in EstoniaViisimaa, Ludmilla; Lepane, Viia; Viitak, Anu; Viisimaa, MattiTallinna Tehnikaülikooli Toimetised1994 / lk. 68-80
• Speciation of chromium using wide-bore capillary electrophoresis with electrothermal atomic absorption spectrometry detectionKuldvee, Ruth; Zaidentsal, Aleksei; Viitak, Anu; Treumann, Maili; Kaljurand, MihkelProceedings of the Estonian Academy of Sciences. Chemistry2004 / 2, p. 65-74 : ill
• The atomic absorption spectrometry of main and trace metals in siliceous soilHödrejärv, Helvi; Vaarmann, Aini; Viitak, Anu; Treumann, MailiChimia1998 / 7/8, p. 383
• The interference of calcium with phosphate in AAsLahne, Riina; Viitak, Anu; Kaljurand, Mihkel; Hödrejärv, Helvi; Treumann, MailiEUROANALYSIS XI : European Conference on Analytical Chemistry : Lissabon, Portugal, September 3-8, 2000 : book of abstracts2001 / p. 100
• The modified methods of determination of bioelements in blood serum of Estonian people by the method of AASViitak, Anu; Fuchs, Kristiina; Kaljurand, Mihkel; Treumann, Maili; Lahne, RiinaIMA'03 : 3rd International Conference : Instrumental Methods of Analysis Modern Trends and Applications : 23-27 September 2003, Thessaloniki, Greece : conference proceedings2003 / p. 230-233 : ill
• The problems of the determination of Pb, Cd and Se by electrothermal AAS in biological samplesViitak, Anu; Treumann, Maili; Lahne, Riina; Susi, Tiina; Hödrejärv, Helvi5th European Furnace Symposium and 10th International Solid Sampling Colloquium with Atomic Spectroscopy, Baloevgrad, Bulgaria, 20022002 / p. 91
• The rate of bone mineralization in birds is directly related to alkaline phosphatase activityTilgar, Vallo; Kilgas, Priit; Viitak, Anu; Reynolds, S.JamesPhysiological and biochemical zoology2008 / 1, p. 106-111
• The relationship of concentration of zinc and copper as symptom for diagnosis of heavy metals background in organismsViitak, Anu; Hödrejärv, Helvi; Vaarmann, Aini; Treumann, MailiFirst Baltic Symposium on Environmental Chemistry : 26-29 September 2001, Tartu, Estonia : abstracts2001 / p. 171-172
• Toxic- and biometals concentration in the hair of children in EstoniaViitak, Anu; Treumann, Maili; Silla, RaiotEuroanalysis IX : European Conference on Analytical Chemistry, Bologna (Italy), September 1-7, 1996 : book of abstracts1996 / p. Mo P 60
• Trace elements as an environmental health problem in EstoniaSilla, Raiot; Viitak, Anu; Teoste, M.International Conference Environmental Pollution and Child Health: critical needs and issues for Central and Eastern Europe, Sosnowiec, May 8-10, 1996 : abstracts1996 / [1] p
• Täiendavad võimalused pikaajaliste kutseekspositsioonide toksilise toime hindamiseksPille, Viive; Muzõka, Vladimir; Bogovski, Sergei; Viitak, Anu; Veidebaum, ToomasEesti Arst2004 / 12, lk. 806-810 https://ojs.utlib.ee/index.php/EA/article/view/9613/4800 https://artiklid.elnet.ee/record=b1048301*est
• Variation in the composition of the essential oils, phenolic compounds and mineral elements of Hypericum perforatum L. growing in EstoniaHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Orav, Anne; Viitak, Anu; Levandi, Tuuli; Kaljurand, MihkelNatural product research2011 / p. 496-510
• Vase määramine bioloogilistes proovides induktiivselt sidestatud plasmaga (ICP)Susi, Tiina; Kruus, A.; Viitak, AnuXXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 27th Estonian Chemistry Days : abstracts of scientific conference2001 / lk. 128
• Virumaa elukeskkond jälle vaekausilHödrejärv, Helvi; Viitak, AnuRahva Hääl1992 / 14. juuli, lk. 2
• Üks tõsine lugu Virumaa saastunud õhustHödrejärv, Helvi; Kallaste, T.; Viitak, AnuViru Sõna : Lääne-Virumaa ajaleht1988 / lk. [?] https://www.ester.ee/record=b1236338*est
• Ведомственное предпринимательство за счет жителей ВирумааKallaste, T.; Hödrejärv, Helvi; Viitak, AnuЛенинское знамя : орган Кохтла-Ярвеского городского и районого комитетов Компартии Эстоний, городского и районного Советов народных депутатов1988 / с. [?] https://www.ester.ee/record=b1528511*est
• Ведомственному самоуправству барьерKallaste, T.; Hödrejärv, Helvi; Viitak, AnuСоветская Эстония : орган ЦК Компартии Эстонии, Верховного Совета и Совета Министров Эстонской ССР1988 / с. [?] https://www.ester.ee/record=b1447330*est
• О содержании свинца, кадмия и ртути в организме населения разных районов Эстонской ССРViitak, Anu; Hödrejärv, HelviРанняя диагностика действия токсических веществ на организм = Early diagnosis of the effects of toxic substances on the organism : материалы третьего научного симпозиума, Таллинн, 19-20 октября 1983 года1984 / с. 97-105 https://www.ester.ee/record=b1240419*est
• Определение свинца в крови атомно-абсорбционном спектрофотометрическим методомViitak, Anu; Hödrejärv, HelviНекоторые усовершенствованные методы лабораторных исследований в клинической и экспериментальной токсикологии : методическое пособие1983 / с. 7-11 https://www.ester.ee/record=b1314532*est
• Определение свинца в моче атомно-абсорбционном спектрофотометрическим методомViitak, Anu; Hödrejärv, HelviНекоторые усовершенствованные методы лабораторных исследований в клинической и экспериментальной токсикологии : методическое пособие1983 / с. 12-15 https://www.ester.ee/record=b1314532*est
• Определение тяжелых металлов в биосфере ЭстонииHödrejärv, Helvi; Viitak, Anu; Ott, Roman; Varandi, Merje; Lepane, Viia; Vaarmann, AiniVI научная конференция по аналитической химии Прибалтийских республик, Белорусской ССР и Калининградской области, Рига, 29 окт.-2 нояб. 1990 : тезисы докладов1990 / с. 195
• Содержание некоторых тяжелых металлов в волосах населения в северной и северо-восточной ЭстонииViitak, Anu; Hödrejärv, Helvi; Silla, RaiotEesti noorsoo areng ja tervis : konverents, Kohtla-Järve, 19911991 / lk. 11-13
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