Gallardo, Rodrigo A. “Infectious Bronchitis Virus Variants in Chickens: Evolution, Surveillance, Control and Prevention”. Austral Journal of Veterinary Sciences 53, no. 1 (January 19, 2021): 55–62. Accessed May 19, 2024. http://revistas.uach.cl/index.php/australjvs/article/view/6700.