Falfushynska, H. I.; Buyak, B. B.; Tereshchuk, H. V.; Torbin, G. M.; Kasianchuk, M. M. Strengthening of E-Learning at the Leading Ukrainian Pedagogical Universities in the Time of COVID-19 Pandemic. CTE Workshop Proc. 2021, 8, 261-273. https://doi.org/10.55056/cte.237.