1. Cobb 500 Breeder Management Guide;The Cobb Breeding Company,1997
2. Ross Breeders 308 Parent Stock Manual;Ross Breeders Ltd,1998
3. Hubbard Classic Breeder Management Guide;Hubbard Farms Inc.,1996
4. Managing broiler breeder males in production;Newcombe,1996
5. Assessing and achieving fertility: The role of male management;Kiers,1997