Lemeshko, O. V., O. V. Yankovets, V. V. Lemeshko, A. V. Yankovets, and I. O. Basaraba. “MASSIVE OPEN ONLINE COURSES AS A MEANS OF BORDER GUARDS’ PROFESSIONAL COMPETENCE DEVELOPMENT”. Information Technologies and Learning Tools, vol. 75, no. 1, Feb. 2020, pp. 279-93, doi:10.33407/itlt.v75i1.2969.