MARENZI, I.; DEMIDOVA, E.; NEJDL, W.; OLMEDILLA, D.; ZERR, S. Social Software for Lifelong Competence Development: Challenges and Infrastructure. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 3, p. pp. 18–23, 2008. DOI: 10.3991/ijet.v3i0.545. Disponível em: https://online-journals.org/index.php/i-jet/article/view/545. Acesso em: 8 aug. 2022.