The dependence of massive open online courses' engagement rate on learners support models / D. Maslova, G. V. Mozhaeva, K. Yakovleva, T. Kabanova // INTED 2020 : 14th International technology, education and development conference, 2-4 March 2020 - Valencia (Spain) : conference proceedings. [S. l.], 2020. P. 5282-5291. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000563745