- Chemical composition of Serpulli herba essential oil of Estonian originPaaver, Urve; Orav, Anne; Arak, Elmar; Mäeorg, Uno; Raal, Ain1st BBBB Conference on Pharmaceutical Sciences : September 26-28, 2005, Siofok, Hungary : programme book2005 / p. 191-195
- Comparacion de aceites esenciales de Matricaria recutita L. de origen diversoRaal, Ain; Arak, Elmar; Orav, Anne; Ivask, KaireArs pharmaceutica2004 / 2, p. 159-165 https://www.ugr.es/~ars/abstract/44-159-03.pdf
- Comparative chemical composition of the essential oil of Mentha x piperita L. from various geographical sourcesOrav, Anne; Raal, Ain; Arak, ElmarProceedings of the Estonian Academy of Sciences. Chemistry2004 / 4, p. 174-181 : ill
- Comparative chemical composition of the essential oil of Thymus vulgaris L. from different geographical sourcesRaal, Ain; Arak, Elmar; Orav, AnneHerba Polonica2005 / 1/2, p. 10-17
- Comparison of essential oil content and composition of wild majoram and wild thyme growing in Estonia with thyme herbPaaver, Urve; Raal, Ain; Arak, Elmar; Pudersell, K.; Orav, Anne; Ivask, KairePharmacy and Pharmaceutical Sciences World Congress : FIP 2002, Nice, France : abstracts2002 / p. MAPS-P-406
- Comparison of essential oil content of Matricaria recutita L. from different originsRaal, Ain; Arak, Elmar; Orav, Anne; Ivask, KaireArc pharmatica2003 / 1, p. 159-165
- Composition of essential oil of aerial parts of Chamomilla suaveolens from EstoniaOrav, Anne; Sepp, Janne; Kailas, Tiiu; Müürisepp, Aleksander-Mati; Arak, Elmar; Raal, AinNatural product communications2010 / 1, p. 133-136
- Composition of the essential oil from wild majoram (Origanum vulgare L.ssp.vulgare) of different originsIvask, Kaire; Orav, Anne; Kailas, Tiiu; Raal, Ain; Arak, Elmar; Paaver, UrveJournal of essential oil research2005 / 4, p. 384-387
- Composition of the essential oil of Artemisia absinthium L. of different geographical originOrav, Anne; Raal, Ain; Arak, Elmar; Müürisepp, Aleksander-Mati; Kailas, TiiuProceedings of the Estonian Academy of Sciences. Chemistry2006 / 3, p. 155-165 : ill
- Composition of the essential oil of Coriandrum sativum L. seeds from various countriesArak, Elmar; Orav, Anne; Raal, AinEuropean journal of pharmaceutical sciences2007 / 1, Supplement 1, p. S22
- Composition of the essential oil of Levisticum officinale W.D.J. Koch from some European countriesRaal, Ain; Arak, Elmar; Orav, Anne; Kailas, Tiiu; Müürisepp, Aleksander-MatiJournal of essential oil research2008 / p. 318-322
- Composition of the essential oil of Origanum vulgare L. ssp. vulgare from various countriesRaal, Ain; Arak, Elmar; Orav, AnnePlanta medica2007 / 9, p. 929
- Composition of the essential oil of Salvia officinalis L. from various European countriesRaal, Ain; Orav, Anne; Arak, ElmarNatural product research2007 / 5, p. 406-411
- Content and composition of essential oil in oregano (Origanum vulgare) growing in EstoniaRaal, Ain; Orav, Anne; Ivask, Anu; Arak, ElmarThe 6th International Pharmaceutical Conference "Science and Practice 2015" : November 5-6, 2015, Kaunas, Lithuania : book of abstracts2015 / p. 62
- Content and composition of essential oils in some Asteraceae speciesRaal, Ain; Kaur, Helen; Orav, Anne; Arak, Elmar; Kailas, Tiiu; Müürisepp, Aleksander-MatiProceedings of the Estonian Academy of Sciences2011 / 1, p. 55-63
- Content and composition of the essential oil of Chamomilla recutita (L.)Rauschert from some European countriesOrav, Anne; Raal, Ain; Arak, ElmarNatural product research2010 / 1, p. 48-55
- Content and composition of the essential oil of Thymus serpyllum L. growing wild in EstoniaRaal, Ain; Paaver, Urve; Arak, Elmar; Orav, AnneMedicina2004 / 8, p. 795-800
- Content of essential oil, terpenoids and polyphenols in commercial chamomile (Chamomilla recutita L. Rauschert) teas from different countriesRaal, Ain; Orav, Anne; Püssa, Tõnu; Valner, Catri; Malmiste, Birgit; Arak, ElmarFood chemistry2012 / p. 632-638 : ill https://www.sciencedirect.com/science/article/pii/S0308814611013008
- CYDEX B kapillaarkolonni kasutamine terpeenide identifitseerimisel taimsetes eeterlikes õlidesOrav, Anne; Ivask, Kaire; Raal, Ain; Arak, ElmarXXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 97
- Eesti koriandri, salvei ja teekummeli eeterliku õli koostise võrdlus nende välismaiste analoogidegaOrav, Anne; Kailas, Tiiu; Jeršova, M.; Raal, Ain; Arak, ElmarXXVIII Eesti keemiapäevad : teaduskonverentsi ettekannete teesid = 28th Estonian Chemistry Days : abstracts of scientific conference2002 / lk. 97
- Eestis kasvava hariliku pune ja nõmm-liivatee eeterliku õli koostise võrdlus aed-liivatee eeterliku õligaPaaver, Urve; Raal, Ain; Karjel, Krista; Arak, Elmar; Orav, Anne; Ivask, KaireEesti Arst2002 / 9, lk. 577 https://artiklid.elnet.ee/record=b1037032*est
- Eestis kasvava nõmm-liivatee (Thynus serpyllum L.) eeterliku õli sisalduse vastavus Euroopa farmakopöa nõuetelePaaver, Urve; Raal, Ain; Arak, Elmar; Reiman, Raina; Orav, AnneEesti Arst2003 / 9, lk. 646 https://artiklid.elnet.ee/record=b1043765*est
- Essential oil composition of Coriandrum sativum L. fruits from different countriesOrav, Anne; Arak, Elmar; Raal, AinJournal of essential oil bearing plants2011 / p. 118-123
- Essential oil composition of Foeniculum vulgare Mill. fruits from pharmacies in different countriesRaal, Ain; Orav, Anne; Arak, ElmarNatural product research2012 / p. 1173-1178 https://www.tandfonline.com/doi/full/10.1080/14786419.2010.535154
- Essential oil composition of Pimpinella anisum L. fruits from various European countriesOrav, Anne; Raal, Ain; Arak, ElmarNatural product research2008 / 3, p. 227-232 https://www.researchgate.net/publication/5586276_Essential_oil_composition_of_Pimpinella_anisum_L_fruits_from_various_European_countries
- Essential oil content and composition in commercial Achillea millefolium L. herbs from different countriesRaal, Ain; Orav, Anne; Arak, ElmarJournal of essential oil bearing plants2012 / p. 22-31 https://www.academia.edu/56949794/Essential_Oil_Content_and_Composition_in_Commercial_Achillea_millefolium_L_Herbs_from_Different_Countries
- Essential oil in Betula spp. leaves naturally growing in EstoniaOrav, Anne; Arak, Elmar; Boikova, Tatjana; Raal, AinBiochemical systematics and ecology2011 / p. 744-748
- Koirohu (Artemisia absinthium L.) eeterliku õli koostisOrav, Anne; Raal, Ain; Arak, Elmar; Kailas, TiiuXXIX Eesti keemiapäevad : teaduskonverentsi ettekannete teesid = 29th Estonian Chemistry Days : abstracts of scientific conference2005 / lk. 75-76
- Phytochemical analysis of the essential oil of Achillea millefolium L. from various European countriesOrav, Anne; Arak, Elmar; Raal, AinNatural product research2006 / 12, p. 1082-1088
- Phytochemical analysis of the essential oil of Thymus serpyllum L. growing wild in EstoniaPaaver, Urve; Orav, Anne; Arak, Elmar; Mäeorg, Uno; Raal, AinNatural product research2008 / 2, p. 108-115
- Pune eeterliku õli koostise mass-spektromeetriline määramineIvask, Kaire; Orav, Anne; Raal, Ain; Arak, ElmarXXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 36
- Study of essential oil from medicinal plants using gas chromatography and mass spectrometryRaal, Ain; Arak, Elmar; Pudersell, K.; Orav, Anne; Kailas, TiiuEuropean journal of pharmaceutical sciences2003 / Supplement 1, XVII Helsinki University Congress of Drug Research, p. P2.1
- The content and composition of the essential oil found in Carum carvi L. commercial fruits obtained from different countriesRaal, Ain; Arak, Elmar; Orav, AnneThe journal of essential oil research2012 / p. 53-59 https://www.tandfonline.com/doi/pdf/10.1080/10412905.2012.646016
- Variation in the composition of the essential oil of commercial Valeriana officinalis L. roots from different countriesRaal, Ain; Arak, Elmar; Orav, Anne; Kailas, Tiiu; Müürisepp, Aleksander-MatiJournal of essential oil research2008 / 6, p. 524-529 https://www.researchgate.net/publication/241714499_Variation_in_the_Composition_of_the_Essential_Oil_of_Commercial_Valeriana_Officinalis_L_Roots_from_Different_Countries
- Variation in the composition of the essential oil of Valeriana officinalis L. roots from EstoniaRaal, Ain; Orav, Anne; Arak, Elmar; Kailas, Tiiu; Müürisepp, Aleksander-MatiProceedings of the Estonian Academy of Sciences. Chemistry2007 / 2, p. 67-74