MAHMOOD, M.S.; SIDDIQUE, M.; HUSSAIN, I. Carrier State Studies of Infectious Bronchitis Virus in Asymptomatic Layer in Pakistan. International Journal of Poultry Science, Pakistan, v. 3, n. 8, p. 547–549, 2004. DOI: 10.3923/ijps.2004.547.549. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/231. Acesso em: 22 sep. 2025.