OSMAN, M. M., HEMEDA, S. A., HASSANIN, A. A., & HUSSEINY, W. A. (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