21- Amany A. A. F. El-Sahn (2002). Semen evaluation in some local chicken strains. Ph. D. Thesis, Fac. of Agric. Alex. Univer., Alexandria. Egypt.

22- O. A. H. A. El-Ghalid (10/3/2005). Estradiol effects on blood profile and performance of Japanese quail at different stages of production. Ph. D. Thesis, Fac. of Agric. Alex. Univer., Alexandria. Egypt.

23- W. S. A. E. El-Tahawy (29/11/2005). Production of transgenic local chicken by injection of DNA from japanese quails or broiler breeders. Ph. D. Thesis, Fac. of Agric. ( Damanhour branch) Alex. Uni.,  Egypt.

24- M. A. A. E. Arafat (2009??). Effect of copper and selenium supplementations in organic  sources on productive performance, egg quality and some physiological traits of Gimmazh strain. Ph. D. Thesis, Fac. of Agric. ( Damanhour branch) Alex. Univ.,  Egypt.

25- M. D. Shaldam (2009). Influence of source and level of copper and zinc and phytase supplementation on productive performance, meat quality and some physiological traits of peckin ducklings. Ph. D. Thesis, Fac. of Agric. ( Damanhour branch),  Alex. Univ., Egypt.

26- N. A. E. M. Mohammed (12/1/2010). Effect of some non-nutritive additives to prevent the adverse effects of mycotoxin and improve physiological and productive performance of broiler chickens. Fac. of Agric. ( Damanhour branch),  Alex. Univ., Egypt.