GALLARDO, R. A. . Infectious bronchitis virus variants in chickens: evolution, surveillance, control and prevention. Austral Journal of Veterinary Sciences, [S. l.], v. 53, n. 1, p. 55–62, 2021. DOI: 10.4067/S0719-81322021000100055. Disponível em: http://www.ajvs.cl/index.php/ajvs/article/view/34. Acesso em: 19 jan. 2022.