Drigas, Athanasios, and Maria Karyotaki. “Learning Tools and Applications for Cognitive Improvement”. International Journal of Engineering Pedagogy (iJEP) 4, no. 3 (June 12, 2014): pp. 71–77. Accessed April 23, 2024. https://online-journals.org/index.php/i-jep/article/view/3665.