Heisnam Kulabidhu Singh, Wangkhem Jibol Singh, and Banikanta Sharma. “Mortality Characteristics of the Second Wave of Covid 19 Pandemic in a Tertiary Hospital in Manipur, India: A Retrospective Study”. International Journal of Health and Clinical Research 4, no. 24 (December 31, 2021): 53–56. Accessed June 23, 2024. https://ijhcr.com/index.php/ijhcr/article/view/3754.