OSMAN, MOHAMED M.M., SHAABAN A. HEMEDA, ABEER A.I. HASSANIN, и WALAA A. HUSSEINY. 2018. «Polymorphism of Prolactin Gene and Its Association With Egg Production Trait in Four Commercial Chicken Lines». Journal of the Hellenic Veterinary Medical Society 68 (3):391-404. https://doi.org/10.12681/jhvms.15502.