VELETSIANOS, George; NAVARRETE, Cesar. Online social networks as formal learning environments: Learner experiences and activities. The International Review of Research in Open and Distributed Learning, [S. l.], v. 13, n. 1, p. 144–166, 2012. DOI: 10.19173/irrodl.v13i1.1078. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/1078. Acesso em: 16 apr. 2024.