Saleem, Nadia, Aisha M Din, Saba Sadiq, and Masroor Ahmed. “MDB As an Effective Platform of Communication Between Students and Teachers A Study of the Virtual University of Pakistan”. International Journal of Research in E-learning 4, no. 2 (February 1, 2021): 61–75. Accessed May 7, 2025. https://trrest.vot.pl/ojsus/index.php/IJREL/article/view/8353.