Mercurio, Marco, Ilaria Torre, and Simone Torsani. “Design of Adaptive Micro-Content in Second Language Acquisition”. Journal of e-Learning and Knowledge Society 7, no. 3 (September 24, 2011). Accessed July 12, 2020. https://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/555.