GUO, Yuqing. ReCa: A Social Relationship Mining Tool in Virtual Learning Environment. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 8, n. 3, p. pp. 13–16, 2013. DOI: 10.3991/ijet.v8i3.2686. Disponível em: https://online-journals.org/index.php/i-jet/article/view/2686. Acesso em: 3 may. 2024.