Giordano, Giuseppe, and Maria Prosperina Vitale. “Multidimensional Data Analysis to Assess Interactions in an E-Learning Community”. Journal of e-Learning and Knowledge Society 2, no. 2 (October 9, 2012). Accessed April 24, 2024. http://je-lks.org/ojs/index.php/Je-LKS_EN/article/view/713.