KOUTRIKA, G.; BERCOVITZ, B.; KALISZAN, F.; LIOU, H.; GARCIA-MOLINA, H. CourseRank: A Closed-Community Social System through the Magnifying Glass. Proceedings of the International AAAI Conference on Web and Social Media, [S. l.], v. 3, n. 1, p. 98-105, 2009. DOI: 10.1609/icwsm.v3i1.13958. Disponível em: https://ojs.aaai.org/index.php/ICWSM/article/view/13958. Acesso em: 26 feb. 2024.