Arslan, Ayse Kok. “RETRACTED ARTICLE: Exploring ML-Based Classification System for Digital Learning Platforms: A Mapping Technique of Massive Open Online Courses”. Technology audit and production reserves 5, no. 2(67) (November 18, 2022): 15–19. Accessed May 7, 2024. https://journals.uran.ua/tarp/article/view/267263.