• Comparative analysis of the mechanochemical hem activation effect on the microstructure and phase transformations of sedimentary apatitesPetkova, Vilma; Mihaylova, Katerina; Serafimova, Ekaterina; Kaljuvee, TiitJournal of chemical technology and metallurgy2025 / p. 63-74 https://doi.org/10.59957/jctm.v60.i1.2025.6 https://www.scopus.com/pages/publications/85215591631?origin=resultslist
• Impact of high energy milled activation on the thermal properties of Bulgarian and Estonian natural apatitesPetkova, Vilma; Kostova, Bilyana; Serafimova, Ekaterina; Kaljuvee, Tiit; Tõnsuaadu, Kaia; Pelovski, Yoncho2nd Journal of Thermal Analysis and Calorimetry Conference, Budapest, June 18–21, 2019 : book of abstracts2019 / p. 480-481 https://jtac-jtacc.akcongress.com/
• Microstructural and thermal investigations of natural fluorapatite vialong time tribochemical activationPetkova, Vilma; Mihaylova, K.; Serafimova, Ekaterina; Tzvetanova, Y.; Kaljuvee, Tiit; Tõnsuaadu, KaiaJTACC+V4 2025 : 4th Journal of Thermal Analysis and Calorimetry Conference & 10th V4 (Joint Czech-Hungarian-Polish-Slovak) Thermoanalytical Conference : Book of Abstracts2025 / p. 428-429 https://static.akcongress.com/downloads/jtacc/jtacc2025/jtacc2025-boa.pdf
• Phase and structural investigations of the content of natural radionuclides in rock and inorganic building materialsSerafimova, Ekaterina; Petkova, Vilma; Kaljuvee, TiitIOP conference series : materials science and engineering2023 / 8 p. : ill https://doi.org/10.1088/1757-899x/1264/1/012003
• Thermochemical characterization of chicken litter and peat as a source for energy recoveryPetkova, Vilma; Serafimova, Ekaterina; Kaljuvee, Tiit; Pelovsky, YonchoJournal of thermal analysis and calorimetry2013 / p. 683-692 : ill https://doi.org/10.1007/s10973-012-2771-y https://www.scopus.com/sourceid/26983 https://www.scopus.com/record/display.uri?eid=2-s2.0-84880510657&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1007%2Fs10973-012-2771-y%29&sessionSearchId=a6a9a3b6ef7339347899f2ad4e915514&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=J%20THERM%20ANAL%20CALORIM&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000321784900035