Kassymova G., Akhmetova A., Baibekova M., Kalniyazova A., Mazhinov B. ,Mussina S. “E-Learning Environments and Problem-Based Learning”. International Journal of Advanced Science and Technology 29, no. 7s (April 14, 2020): 346 - 356. Accessed May 4, 2024. http://sersc.org/journals/index.php/IJAST/article/view/9447.