Rodríguez-Hidalgo, Roberto C., Chang Zhu, Frederik Questier, and Aida M. Torres-Alfonso. 2015. “Using Social Network Analysis for Analysing Online Threaded Discussions”. International Journal of Learning, Teaching and Educational Research 10 (3):128-46. http://www.ijlter.myres.net/index.php/ijlter/article/view/1117.