Rustamani, Shabnam. “Comparative Evolution of Animal and Human Coronaviruses, Their Varieties and Virulence”. Journal of Liaquat University of Medical & Health Sciences 20, no. 4 (November 18, 2021): 281–283. Accessed November 15, 2024. http://121.52.154.205/index.php/jlumhs/article/view/301.