GALLARDO, Rodrigo 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, jan. 2021. ISSN 0719-8132. Available at: <http://australjvs.cl/index.php/amv/article/view/950>. Date accessed: 27 feb. 2021.