Troussas, Christos, and Maria Virvou. “Information Theoretic Clustering for an Intelligent Multilingual Tutoring System”. International Journal of Emerging Technologies in Learning (iJET) 8, no. 6 (November 8, 2013): pp. 55–61. Accessed May 3, 2024. https://online-journals.org/index.php/i-jet/article/view/3235.