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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS 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