GALAL, A.; EL-MOTAAL, A.M. Abd; AHMED, A.M.H.; ZAKI, T.G. Productive Performance and Immune Response of Laying Hens as Affected by Dietary Propolis Supplementation. International Journal of Poultry Science, Pakistan, v. 7, n. 3, p. 272–278, 2008. DOI: 10.3923/ijps.2008.272.278. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/942. Acesso em: 21 sep. 2025.