Vlasenko, Kateryna V., Sergei V. Volkov, Daria A. Kovalenko, Iryna V. Sitak, Olena O. Chumak, and Alexander A. Kostikov. “Web-Based Online Course Training Higher School Mathematics Teachers”. CTE Workshop Proceedings 7 (March 20, 2020): 648–661. Accessed September 25, 2026. https://acnsci.org/journal/index.php/cte/article/view/420.