Pramanik, Tapas, and Tapas Kumar Sur. “On the Way to COVID-19 Vaccine Development: Tireless Efforts and Outcomes”. Journal of Physiological Society of Nepal 1, no. 2 (December 31, 2020): 3–8. Accessed August 16, 2024. https://nepjol.info/index.php/jpsn/article/view/42285.