Bondar, I., T. Gumenyuk, Y. Horban, O. Karakoz, and O. Chaikovska. “Distance E-Learning in the System of Professional Development of Corporation Managers: Challenges of COVID-19”. Journal of Education and E-Learning Research, vol. 7, no. 4, Dec. 2020, pp. 456-63, doi:10.20448/journal.509.2020.74.456.463.