B. Pronchev, G. ., . I. . V. Goncharova, K. . G. Pronchev, and E. . I. Krichever. “Russians’ Attitude to Distance Learning: A Runet Survey”. International Journal of Learning, Teaching and Educational Research, vol. 18, no. 11, Nov. 2019, pp. 370-84, https://ijlter.net/index.php/ijlter/article/view/463.