Coccoli, Mauro, Saverio Iacono, and Gianni Vercelli. “Applying Gamification Techniques to Enhance Effectiveness of Video-Lessons”. Journal of e-Learning and Knowledge Society 11, no. 3 (September 30, 2015). Accessed February 1, 2023. https://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/1062.