GRABOWSKI, F.; PASZKIEWICZ, A.; BOLANOWSKI, M. The small world theory in e-learning. Journal of Education, Technology and Computer Science, [S. l.], n. 2, p. 245–251, 2014. DOI: 2080-9069. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/6601. Acesso em: 3 jul. 2024.