OVWIGHO, Bishop O.; MMEREOLE, F.U.C.; UDEH, I.; AKPORHUARHO, P.O. Comparison of Constraints to Poultry Producers in Delta State Nigeria. International Journal of Poultry Science, Pakistan, v. 8, n. 5, p. 480–484, 2009. DOI: 10.3923/ijps.2009.480.484. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/1194. Acesso em: 21 sep. 2025.