Levchuk, Viktor. “A Systematic Approach to Modern Trends in E-Learning As a Basis for the Development of E-Learning and Information Security”. EAST JOURNAL OF SECURITY STUDIES 4, no. 1 (May 13, 2019): 80-92. Accessed April 26, 2024. https://ejss.nuczu.edu.ua/index.php/ejss/article/view/11.