PARSON, Vanessa; BIGNELL, Simon. An Investigation into Cooperative Learning in a Virtual World using Problem-Based Learning. Online Learning, Boston, MA, v. 21, n. 2, 2017. DOI: 10.24059/olj.v21i2.796. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/796. Acesso em: 4 apr. 2026.