FILIPOV, Mariyan. MANAGERIAL FACTORS OF STUDENT ENGAGEMENT IN AN ONLINE EDUCATIONAL PLATFORM. E-Journal VFU, [S. l.], n. 25, p. 609–619, 2026. Disponível em: https://ejournal.vfu.bg/index.php/vfu/article/view/307. Acesso em: 24 apr. 2026.