Tsolakidis, Costas, and Persa Fokiali. “Costs of Low-Scale Distance Learning Programs: A Case of Distance Learning Courses in the Aegean Islands”. International Journal of Emerging Technologies in Learning (iJET) 5, no. 1 (February 23, 2010): pp. 32–38. Accessed May 2, 2024. https://online-journals.org/index.php/i-jet/article/view/1132.