Ismail, M. I. . “Coronaviruses of the Veterinary and Socio-Economic Importance: Classification, Pathogenicity, Transmission, and Evolution of the Coronaviruses”. Journal of Tropical Resources and Sustainable Science (JTRSS), vol. 9, no. 2, Dec. 2021, pp. 93-102, doi:10.47253/jtrss.v9i2.781.