Ferri, Fernando, Alessia D’Andrea, Patrizia Grifoni, and Tiziana Guzzo. “Distant Learning: Open Challenges and Evolution”. International Journal of Learning, Teaching and Educational Research 17, no. 8 (August 30, 2018): 78–88. Accessed December 24, 2025. http://ijlter.net/index.php/ijlter/article/view/650.