FEDOSEEV, Andrei. E-tutor for E-learning. International Journal of Research in E-learning, [S. l.], v. 4, n. 1, p. 78–86, 2018. Disponível em: https://trrest.vot.pl/ojsus/index.php/IJREL/article/view/8343. Acesso em: 7 may. 2025.