P. Sadhukhan, I. Sutnga, B. Bingari, and A. Choudhury, “A Retrospective Assessment of the Initial Phase of Covid-19 and Its Implemented Treatment Strategies”, J. Drug Delivery Ther., vol. 11, no. 3-S, pp. 81–89, Jun. 2021, doi: 10.22270/jddt.v11i3-S.4868.