Sebastián, Gabriel, Ricardo Tesoriero, and Jose A. Gallud. “Unified Abstract Mechanism to Model Language Learning Activities”. Computing and Informatics 40, no. 2 (October 12, 2021): 249–276. Accessed November 7, 2024. http://147.213.75.17/ojs/index.php/cai/article/view/2021_2_249.