De Santis, Annamaria, Katia Sannicandro, Claudia Bellini, and Tommaso Minerva. “Predictive Model Selection for Completion Rate in Massive Open Online Courses”. Journal of e-Learning and Knowledge Society 15, no. 3 (October 12, 2019): 145-159. Accessed December 11, 2019. https://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/1135034.