Koutrika, G., Bercovitz, B., Kaliszan, F., Liou, H. and Garcia-Molina, H. 2009. CourseRank: A Closed-Community Social System through the Magnifying Glass. Proceedings of the International AAAI Conference on Web and Social Media. 3, 1 (Mar. 2009), 98-105. DOI:https://doi.org/10.1609/icwsm.v3i1.13958.