ARBONA, D.V.; ANDERSON, K.E.; HOFFMAN , J.B. A Comparison of Humoral Immune Function in Response to a Killed Newcastle’s Vaccine Challenge in Caged Vs. Free-range Hy-line Brown Layers. International Journal of Poultry Science, Pakistan, v. 10, n. 4, p. 315–319, 2011. DOI: 10.3923/ijps.2011.315.319. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/1613. Acesso em: 21 sep. 2025.