Valarmady, R, D Pradeepa, and S G Rajasekar. “E-Learning Concepts, Merits and Demerits”. International Journal of Engineering and Technology 7, no. 3.1 (August 4, 2018): 136–138. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/16817.