Bala, R., N. Gupta, R. Sharma, U. Narang, S. Joshi, and C. N. Navid. “Medical student’s Perception and Feed-Back on Virtual Classes During COVID-19 Pandemic: A Multi-Centric Questionnaire Based Study”. International Journal of Health and Clinical Research, vol. 3, no. 4, Aug. 2020, pp. 93-96, https://www.ijhcr.com/index.php/ijhcr/article/view/113.