GURBA, Krzysztof. Individual and Collaborative Online Learning – Reasonable Compromise. International Journal of Research in E-learning, [S. l.], v. 7, n. 2, p. 1–17, 2022. DOI: 10.31261//IJREL.2021.7.2.08. Disponível em: https://journals.us.edu.pl/index.php/IJREL/article/view/12534. Acesso em: 5 dec. 2025.