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Rang, Toomas; Toompuu, JanaSilicon Carbide and Related Materials 2019 : Selected peer-reviewed papers from International Conference on Silicon Carbide and Related Materials 2019 (ICSCRM 2019), September 29 - October 4, 2019, Kyoto, Japan Materials science forum2020 / p. 960-972 https://doi.org/10.4028/www.scientific.net/MSF.1004.960 Conference proceedings at Scopus Article at Scopus Analysis of deep level spectrum in GaAs p+-p-i-n-n+ structuresToompuu, Jana; Sleptšuk, Natalja; Korolkov, Oleg; Rang, ToomasMaterials characterization VII2015 / p. 283-294 : ill Analysis of grain orientation and defects in Sb2Se3 solar cells fabricated by close-spaced sublimationKrautmann, Robert; Spalatu, Nicolae; Gunder, Rene; Abou-Ras, Daniel; Unold, Thomas; Schorr, Susan; Oja Acik, Ilona; Krunks, MalleGSFMT Scientific Conference 2021 : Tartu, June 14-15, 2021 : abstracts2021 / P 17 https://fmtdk.ut.ee/wp-content/uploads/2021/06/GSFMT_abstractbook_2021.pdf Analysis of grain orientation and defects in Sb2Se3 solar cells fabricated by close-spaced sublimation : [journal article]Krautmann, Robert; Spalatu, Nicolae; Gunder, Rene; Abou-Ras, Daniel; Unold, Thomas; Schorr, Susan; Krunks, Malle; Oja Acik, IlonaSolar energy2021 / p. 494-500 https://doi.org/10.1016/j.solener.2021.07.022 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Analysis of microstructure and abrasive wear of Fe-based hardfacings with TiC, in-situ synthesized from TiO2Yöyler, Sibel; Surzhenkov, Andrei; Antonov, Maksim; Viljus, Mart; Traksmaa, Rainer; Juhani, KristjanEuro PM2023 : proceedings2023 / art. 195090 https://doi.org/10.59499/EP235762969 Analysis of organic species in sediments and soil by high performance separation methods = Orgaaniliste ainete analüüs sette ja mulla proovides kõrgefektiivsete lahutusmeetodite abilMakarõtševa, Natalja2011 https://digi.lib.ttu.ee/i/?614 Application of diffuse reflectance spectroscopy for quick laboratory assessment of Estonian oil shale qualityTufail, Iram; Paris, Peeter; Jõgi, Indrek; Riisalu, HellaProceedings of the Estonian Academy of Sciences2020 / p. 134-142 : ill https://doi.org/10.3176/proc.2020.2.04 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Assessing tissue hydration dynamics based on water/fat separated MRIKarlsson, Markus; 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Danilson, Mati; Mikli, Valdek; Bereznev, SergeiGraduate School of Functional Materials and Technology (GSFMT) Scientific Conference : abstracts2022 / art. 54 Graduate School of Functional Materials and Technology (GSFMT) Scientific Conference 2022 Comparison of individual SiC JBS chips and JBS stacks connected in series by diffusion weldingSleptšuk, Natalja; Korolkov, Oleg; Toompuu, Jana; Rang, ToomasBEC 2010 : 2010 12th Biennial Baltic Electronics Conference : proceedings of the 12th Biennial Baltic Electronics Conference : Tallinn University of Technology, October 4-6, 2010, Tallinn, Estonia2010 / p. 81-84 : ill Detection of deuterium retention by LIBS at different background pressuresParis, Peeter; Butikova, J.; Laan, Matti; Aints, Mart; Hakola, A.; Piip, Kaarel; Tufail, Iram; Veis, P.Physica scripta2017 / art. 014003, 5 p. : ill https://doi.org/10.1088/0031-8949/2017/T170/014003 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Determination of heating value of Estonian oil shale by laser-induced breakdown spectroscopyAints, Mart; 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Reshma; Mandati, Sreekanth; Ramasamy, Easwaramoorthi; Mallick, S; Rao, Tata Naransinga; Veerappan, GanapathyMaterials letters2021 / art. 130056, 4 p. : ill https://doi.org/10.1016/j.matlet.2021.130056 Reaction pathway to Cu2ZnSnSe4 formation in CdI2 : part 1. Chemical reactions and enthalpies in mixtures of CdI2–ZnSe, CdI2–SnSe, and CdI2–CuSeLeinemann, Inga; Nkwusi, Godswill; Timmo, Kristi; Volobujeva, Olga; Danilson, Mati; Raudoja, Jaan vt.ka Mädasson, Jaan; Kaljuvee, Tiit; Traksmaa, Rainer; Altosaar, Mare; Meissner, DieterJournal of thermal analysis and calorimetry2018 / p.409 - 421 : ill https://doi.org/10.1007/s10973-018-7102-5 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Recent advances of carbon nanotubes synthesis by the electric arc technique using atomized platinum-group metal catalystsTruus, Kalle; Volobujeva, Olga; Kaupmees, Reelika; Tamm, Aile; Rähn, Mihkel; Raid, Raivo; Koppel, Kaida; Tuvikene, RandoMaterials Science and Engineering: B2024 / art. 117121 https://doi.org/10.1016/j.mseb.2023.117121 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Rectangular wave excitation in wideband bioimpedance spectroscopyMin, Mart; Paavle, Toivo; Annus, Paul; Land, RaulIEEE International Workshop on Medical Measurements and Applications : MeMeA2009 : Cetraro, Italy, May 29-30, 20092009 / p. 268-271 Revealing aspects of cardiac function from fluorescence and electrophysiological recordings = Südametalituse uuringud fluorestsentsi ja elektrofüsioloogiliste mõõtmiste abilLaasmaa, Martin2016 http://www.ester.ee/record=b4632325*est https://digikogu.taltech.ee/et/Item/5e9f5bd2-8295-4f7e-8f6d-65d0b8002a74 A review on the application of machine learning in gamma spectroscopy : challenges and opportunitiesZehtabvar, Mehrnaz; Taghandiki, Kazem; Madani, Nahid; Sardari, Dariush; Bashiri, BashirSpectroscopy journal2024 / p. 123-144 https://doi.org/10.3390/spectroscj2030008 Sb2S3 solar cells with TiO2 electron transporting layers synthesized by ALD and USP methodsDedova, Tatjana; Krautmann, Robert; Rusu, Marin; Katerski, Atanas; Krunks, Malle; Unold, Thomas; Spalatu, Nicolae; Mere, Arvo; Sydorenko, Jekaterina; Sibinski, Maciej; Oja Acik, IlonaSolar energy materials and solar cells2025 / art. 113279 https://doi.org/10.1016/j.solmat.2024.113279 Shortfall of B3LYP in reproducing NMR JCH couplings in some isomeric epoxy structures with strong stereoelectronic effects : a benchmark study on DFT functionalsAdamson, Jasper; Nazarski, Ryszard B.; Jarvet, Jüri; Pehk, Tõnis; Aav, RiinaChemPhysChem2018 / p. 631-642 : ill https://doi.org/10.1002/cphc.201701125 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Solid-state heteronuclear multiple-quantum spectroscopy under a magic-angle spinning frequency of 150 kHzYuan, Eric Chung-Yueh; Chen, Po-Wen; Huang, Shing-Jong; Org, Mai-Liis; Samoson, Ago; Chan, Jerry Chun ChungJournal of the Chinese Chemical Society2022 / p. 1449-1461 https://doi.org/10.1002/jccs.202200063 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Some errors during impedance measurementAnnus, Paul; Land, Raul; Min, MartBook of abstracts : 16th International Conference on Electrical Bio-Impedance : 17th Conference on Electrical Impedance Tomography : ICEBI and EIT Stockholm, 19-23 June 20162016 / p. 90 Spectroscopic monitoring of carbamazepine crystallization and phase transformation in ethanol-water solutionQu, Haiyan; Kohonen, Jarno; Louhi-Kultanen, Marjatta; Reinikainen, Satu-Pia; Kallas, JuhaIndustrial & engineering chemistry2008 / p. 6991-6998 Spectroscopic properties, conduction processes and the Summerfield scaling of barium titanate ceramics based on Bi and FeGouadria, Hamida; Mnasri, Taoufik; Jamale, Atul P.; López Sánchez, Jesús; Necib, Jallouli; Marín, Pilar; Carmona, Noemi; Smari, MouradInorganic chemistry communications2023 / art. 111417 https://doi.org/10.1016/j.inoche.2023.111417 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS The spectroscopy of the quantum criticality in a transverse field ising chain compound CoNb2O6 [Online resource]Viirok, Johan; Hüvonen, Dan; Rõõm, Toomas; Nagel, UrmasTartu Ülikooli ASTRA projekt PER ASPERA : Funktsionaalsed materjalid ja tehnoloogiad : [4.-5. veebr. 2019, Tartu : teesid]2019 / 1 p http://fmtdk.ut.ee/teesid-2019/ Spin-waves in magnetoelectric materials with strong single-ion anisotropy = Spinn-lained tugeva anisotroopiaga magnetelektrilistes materjalidesPeedu, Laur2022 https://doi.org/10.23658/taltech.69/2022 https://digikogu.taltech.ee/et/Item/b0fe0699-1bc6-407d-bcce-2d0600f4ddd4 https://www.ester.ee/record=b5527933*est Study of kesterite solar cell absorbers by capacitance spectroscopy methods = Kesteriitsete päikesepatareide absorbermaterjalide uurimine mahtuvusspektroskoopiliste meetoditegaKask, Erkki2016 https://www.ester.ee/record=b4573390*est Substitution of histidine 30 by asparagine in manganese superoxide dismutase alters biophysical properties and supports proliferation in a K562 leukemia cell lineBonetta, Rosalin; Hunter, Gary J.; Trinh, Chi H.; Borowski, Tomasz; Fenech, Anthony G.; Kulp, Maria; Tabares, Leandro C.; Un, Sun; Hunter, ThérèseEuropean biophysics journal2021 / p. 571-585 : ill https://doi.org/10.1007/s00249-021-01544-2 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Supramolecular chirogenesis in a sterically hindered Porphyrin : a critical theoretical analysisOsadchuk, Irina; Luts, Hanna-Eliisa; Norvaiša, Karolis; Borovkov, Victor; Senge, Mathias O.Chemistry : a European journal2023 / art. e202301408 https://doi.org/10.1002/chem.202301408 Supramolecular chirogenesis in a sterically hindered porphyrin: a critical theoretical analysisOsadchuk, Irina; Luts, Hanna-Eliisa; Norvaiša, Karolis; Borovkov, Victor; Senge, Mathias O.Chemistry : a European journal2023 / art. e202302275 https://doi.org/10.1002/chem.202302275 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Synthesis and characterization of pyrite FeS2 solar cell absorber crystals and modifying their surfaceKristmann, Katriin; Raadik, Taavi; Altosaar, Mare; Mikli, Valdek; Danilson, MatiGraduate School of Functional Materials and Technology (GSFMT) Scientific Conference : abstracts2022 / 29 l. Graduate School of Functional Materials and Technology (GSFMT) Scientific Conference 2022 Synthesis and characterization of tetrahedrite Cu10Cd2Sb4S13 monograin material for photovoltaic applicationGhisani, Fairouz; Timmo, Kristi; Altosaar, Mare; Raudoja, Jaan; Mikli, Valdek; Pilvet, Maris; Kauk-Kuusik, Marit; Grossberg, MaarjaMaterials science in semiconductor processing2020 / art. 104973 https://doi.org/10.1016/j.mssp.2020.104973 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Synthesis control of charge separation at anatase TiO2 thin films studied by transient surface photovoltage spectroscopyDittrich, Thomas; Sydorenko, Jekaterina; Spalatu, Nicolae; Nickel, Norbert H.; Mere, Arvo; Krunks, Malle; Oja Acik, IlonaACS applied materials & interfaces2022 / p. 43163-43170 https://doi.org/10.1021/acsami.2c09032 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS ZnO nanorods via spray deposition of solutions containing zinc chloride and thiocarbamideDedova, Tatjana; Volobujeva, Olga; Klauson, Jelena; Mere, Arvo; Krunks, MalleNanoscale research letters2007 / p. 391-396 : ill https://link.springer.com/article/10.1007/s11671-007-9072-6 Temperature dependent electrical characterization of thin film Cu2ZnSnSe4 solar cellsKask, Erkki; Krustok, Jüri; Giraldo, Sergio; Neuschitzer, Markus; Lopez-Marino, Simon; Saucedo, E.M.Journal of Physics D: Applied Physics2016 / art. 085101 https://doi.org/10.1088/0022-3727/49/8/085101 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Terahertz absorption spectroscopy study of spin waves in orthoferrite YFeO3 in a magnetic fieldAmelin, Kirill; Nagel, Urmas; Fishman, R.S.; Yoshida, Y.; Sim, Hasung; Park, Kisoo; Park, Je-Geun; Rõõm, ToomasPhysical review B2018 / art. 174417, 6 p. : ill https://doi.org/10.1103/PhysRevB.98.174417 Terahertz spectroscopy of spin excitations in magnetoelectric LiFePO4 in high magnetic fieldsPeedu, Laur; Kocsis, V.; Szaller, D.; Forrai, B.; Bordacs, S.; Kezsmarki, I.; Viirok, Johan; Nagel, Urmas; Bernath, B.; Kamenskyi, D.L.; Miyata, A.; Portugall, O.; Tokunaga, Y.; Tokura, Y.; Taguchi, Y.; Rõõm, ToomasPhysical review B2022 / art. 134413, 12 p. : ill https://doi.org/10.1103/PhysRevB.106.134413 Terahertz spectroscopy of the helium endofullerene He@C60Jafari, Tanzeeha; Bacanu, George Razvan; Shugai, Anna; Nagel, Urmas; Walkey, Mark; Hoffman, Gabriela; Levitt, Malcolm H.; Whitby, Richard J.; Rõõm, ToomasPhysical chemistry chemical physics2022 / p. 9943–9952 : ill https://doi.org//10.1039/d2cp00515h TG-FTIR analysis of oxidation kinetics of some solid fuels under oxy-fuel conditionsMeriste, T.; Yörük, Can Rüstü; Trikkel, Andres; Kuusik, Rein, keemikICTAC 15 - 15th International Congress on Thermal Analysis and Calorimetry : August 20-24, 2012, Osaka2012 https://link.springer.com/article/10.1007/s10973-013-3063-x The effect of S/SE ratio on the properties of Cu2CdGe(SxSe1-x)4 monograin powders for photovoltaic applicationsLi, Xiaofeng; Kauk-Kuusik, Marit; Timmo, Kristi; Pilvet, Maris; Grossberg, Maarja; Raadik, Taavi; Danilson, Mati; Mikli, ValdekGSFMT Scientific Conference 2020 : Tallinn, February 4-5, 2020 : abstracts2020 / p. 52 http://fmtdk.ut.ee/wp-content/uploads/2020/01/GSFMT2020.pdf The role of structural properties on deep defect states in Cu2ZnSnS4 studied by photoluminescence spectroscopyGrossberg, Maarja; Krustok, Jüri; Raudoja, Jaan; Raadik, TaaviApplied physics letters2012 / p. 102102-1 - 102102-4 : ill https://pubs.aip.org/aip/apl/article/101/10/102102/126713/The-role-of-structural-properties-on-deep-defect Thermal behavior of Estonian graptolite-argillite from different depositsKaljuvee, Tiit; Tõnsuaadu, Kaia; Einard, Marve; Mikli, Valdek; Kivimäe, Eliise-Koidula; Kallaste, Toivo; Trikkel, AndresProcesses2022 / art. 1986 https://doi.org/10.3390/pr10101986 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Thermal decomposition study of HAuCl4·3H2O and AgNO3 as precursors for plasmonic metal nanoparticlesOtto, Kairi; Oja Acik, Ilona; Krunks, Malle; Tõnsuaadu, Kaia; Mere, ArvoJournal of thermal analysis and calorimetry2014 / p. 1065-1072 : ill https://doi.org/10.1007/s10973-014-3814-3 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS THz gyrotron and BWO designed for operation in DNP-NMR spectrometer magnetBratman, V. L.; Fedotov, A. E.; Kalynov, Yu K.; Makhalov, Petr B.; Samoson, AgoJournal of Infrared, Millimeter, and Terahertz Waves2013 / p. 837 - 846 https://doi.org/10.1007/s10762-013-0024-1 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS To question indirect of objektive estimation influence of noises and vibrations on spectral parameters of speakerPospelov, B.; Dolotin, K.Proceedings of the International EAA/EEAA Symposium : Transport Noise and Vibration, Tallinn, 8.06 - 10.06. 19981998 / p. 63-64 Two-photon spectroscopy as a new quantitative protonation probe = Kahefotoonne neeldumisspektroskoopia kui uus kvantitatiivne protoneerimise sondRammo, Matt2023 https://doi.org/10.23658/taltech.21/2023 https://digikogu.taltech.ee/et/Item/f9c53f09-f44d-431c-9c3d-5858e514a3a4 https://www.ester.ee/record=b5560469*est Waste paper sorting using imaging spectroscopyPõlder, Ahti; Juurma, Märt; Tamre, Mart13th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 14-19, 20132013 / p. 283-284 : ill ВУФ-спектроскопия и дефекты нестехиометрических содалитовDenks, Viktor; Ruus, TõnuВакуумная ультрафиолетовая спектроскопия ионных кристаллов : [сборник статей]1981 / с. 97-124 : илл https://www.ester.ee/record=b1310295*est Исследование p-n-переходов на основе 4H-SiC, изготовленных имплантацией бора, методом нестационарной емкостной спектроскопииIvanov, Pavel; Potapov, Alexander; Samsonova, Tatyana; Korolkov, Oleg; Sleptšuk, NataljaФизика и техника полупроводников2011 / с. 1358-1362 : ил Исследование структуры фенолформальдегидных поликонденсационных смол спектроскопическими методами. Сообщение V, Определение состава хроматографических фракций поликонденсатов 5-метилрезорцина с N-оксиметилкапролактамомLippmaa, Helle; Pehk, Tõnis; Christjanson, PeepСинтез и применение поликонденсационных клеев. [1]1977 / с. 31-39 : илл https://www.ester.ee/record=b1418128*est https://digikogu.taltech.ee/et/Item/708124e8-a979-4c67-92ae-ee529ff008a7 Исследование структуры фенолформальдегидных поликонденсационных смол спектроскопическими методами. Сообщение 1. Изучение влияния прибавки капролактама на реакцию поликонденсации диметилол-п-крезолаLippmaa, Helle; Kiisler, Karl; Pehk, TõnisТехнология органических веществ. 61974 / с. 81-92 : илл https://www.ester.ee/record=b1446922*est https://digikogu.taltech.ee/et/Item/22bf26dc-cffe-498c-b90f-34dc039a428f Исследование структуры фенолформальдегидных поликонденсационных смол спектроскопическими методами. Сообщение 2. Поликонденсаты резорцина и 5-метилрезорцина и влияние прибавки капролактама на их структуруLippmaa, Helle; Pehk, Tõnis; Kiisler, Karl; Christjanson, PeepТехнология органических веществ. 61974 / с. 93-107 : илл https://www.ester.ee/record=b1446922*est https://digikogu.taltech.ee/et/Item/22bf26dc-cffe-498c-b90f-34dc039a428f Исследование структуры фенолформальдегидных поликонденсационных смол спектроскопическими методами. Сообщение 3. Изучение продуктов поликонденсации резорцина с N - метилолкапролактамомLippmaa, Helle; Pehk, Tõnis; Kiisler, Karl; Christjanson, PeepТехнология органических веществ. 61974 / с. 109-122 : илл https://www.ester.ee/record=b1446922*est https://digikogu.taltech.ee/et/Item/22bf26dc-cffe-498c-b90f-34dc039a428f Исследование структуры фенолформальдегидных поликонденсационных смол спектроскопическими методами. Сообщение 4 : Определение состава хроматографических фракций поликонденсатов резорцина с N-оксиметилкапролактамомLippmaa, Helle; Pehk, Tõnis; Christjanson, PeepТехнология органических веществ. 81976 / с. 73-91 : илл https://www.ester.ee/record=b1475761*est https://digikogu.taltech.ee/et/Item/38b2a836-99da-4b82-8058-1c2084a10575 Исследование структуры фенолформальдегидных смол спектроскопическими методами. Сообщ. 12, ЯМР ¹³С отвержденных резорцин- и 5-метилрезорцинформальдегидных смолLippmaa, Helle; Samoson, A.V.Синтез и применение поликонденсационных клеев. 91986 / с. 13-25 Исследование структуры фенолформальдегидных смол спектроскопическими методами. Сообщение IX, Сравнивание состава и структуры резорциновых и 5-метилрезорциновых смолLippmaa, HelleСинтез и применение поликонденсационных клеев : сборник статей. 51982 / с. 13-21 : ил https://www.ester.ee/record=b2191036*est https://digikogu.taltech.ee/et/Item/948b14fd-94ea-4872-8724-96cfc1c27afe Исследование структуры фенолформальдегидных смол спектроскопическими методами. Сообщение VI, Гелевая хроматография поликонденсатов 5-метилрезорцинаLippmaa, Helle; Christjanson, Peep; Pehk, TõnisСинтез и применение поликонденсационных клеев. 21978 / с. 49-60 : илл https://www.ester.ee/record=b2191006*est https://digikogu.taltech.ee/et/Item/b615a4dd-bb4c-4a80-888a-b13d1a4c52d3 Исследование структуры фенолформальдегидных смол спектроскопическими методами. Сообщение VII, Влияние различных катализаторов на химическую структуру резорцин-формальдегидной смолыLippmaa, Helle; Olivson, A.Синтез и применение поликонденсационных клеев. 31980 / с. 45-53 : илл https://www.ester.ee/record=b2191029*est https://digikogu.taltech.ee/et/Item/18e952ba-a2c4-42b8-9e19-228f813bf9e9 Исследование структуры фенолформальдегидных смол спектроскопическими методами. Сообщение VIII, ГПХ/ЯМР ¹³С анализ фенол-5-метилрезорцинформальдегидной смолыLippmaa, Helle; Siilats, V.; Christjanson, PeepСинтез и применение поликонденсационных клеев. 41981 / с. 15-27 : илл https://www.ester.ee/record=b2191035*est https://digikogu.taltech.ee/et/Item/b5691e32-e425-4279-b0c6-86c2af1f88a1 Попытка установления схемы ассоциации спиртов методы ИК-спектроскопииMölder, Leevi; Viikna, AntiТезисы докладов V Всесоюзной Менделеевской дискуссии по проблеме "Специфичность и чувствительность методов исследования растворов и возможности сопоставления их результатов", 10-12 окт. 1978 г.1978 / с. 222-223 Реакция амидометилирования. Сообщение XIV, Спектроскопическое исследование структуры N,N'-[(1,3-диоксифенил)-4,6-диметил]-ди-ε-капролактамаOja, Holger; Christjanson, Peep; Välimäe, ToomasСинтез и применение поликонденсационных клеев. 31980 / с. 13-23 : илл https://www.ester.ee/record=b2191029*est https://digikogu.taltech.ee/et/Item/18e952ba-a2c4-42b8-9e19-228f813bf9e9 Реакция амидометилирования. Сообщение 26, Спектроскопическое исследование пара-монозамещенных производных 2,6- и 2,5-диметилфеноловOja, Holger; Arro, ZemfiraTallinna Tehnikaülikooli Toimetised1990 / lk. 39-49: ill Спектроскопическое исследование продуктов пиролиза полиэтиленаPiiroja, Eduard; Oja, HolgerTallinna Tehnikaülikooli Toimetised1990 / lk. 69-79: ill