Shevchenko В.; GLADGOV, O. Distance Education: problems of theory and contradiction of practice. Journal of Information Technologies in Education (ITE), [S. l.], n. 4, p. 233–242, 2009. DOI: 10.14308/ite000112. Disponível em: https://www.ite.kspu.edu/index.php/ite/article/view/620. Acesso em: 5 dec. 2025.