Obonya, Juraj, and Miroslav Kadlečík. “Assessing the Intensity of the Usability of the Course Content Within the Virtual Learning Environment”. International Journal of Emerging Technologies in Learning (iJET) 15, no. 17 (September 11, 2020): pp. 165–180. Accessed November 22, 2024. https://online-journals.org/index.php/i-jet/article/view/13715.