Rigutti, Sara, Gisella Paoletti, and Anna Morandini. “Lifelong Learning and E-Learning 2.0: The Contribution of Usability Studies”. Journal of e-Learning and Knowledge Society 4, no. 1 (November 16, 2009). Accessed December 10, 2024. https://je-lks.org/ojs/index.php/Je-LKS_EN/article/view/265.