RENZEL, D.; HÖBELT, C.; DAHRENDORF, D.; FRIEDRICH, M.; MÖDRITSCHER, F.; VERBERT, K.; GOVAERTS, S.; PALMÉR, M.; BOGDANOV, E. Collaborative Development of a PLE for Language Learning. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 5, n. SI1, p. pp. 31–40, 2010. DOI: 10.3991/ijet.v5iSI1.1196. Disponível em: https://online-journals.org/index.php/i-jet/article/view/1196. Acesso em: 28 apr. 2024.