Mosenkis, I. L., L. V. Lukianyk, O. M. Strokal, V. A. Ponomarova, and H. V. Mykhailiuk. “Application of Cloud Educational Technologies for Teacher Competence Development”. International Journal of Learning, Teaching and Educational Research, vol. 19, no. 5, May 2020, pp. 289-03, http://www.ijlter.net/index.php/ijlter/article/view/346.