Sobhi, B. M., E. Y. Ismael, A. S. . Mansour, M. Elsabagh, and K. N. E.- din . Fahmy. “Effect of Nano-Hydroxyapatite As an Alternative to Inorganic Dicalcium Phosphate on Growth Performance, Carcass Traits, and Calcium and Phosphorus Metabolism of Broiler Chickens”. Journal of Advanced Veterinary Research, vol. 10, no. 4, Oct. 2020, pp. 250-6,