Sohail, A. ., A. . Muhammad, J. . Hussain, A. . Iqbal, M. . Usman, A. . Rehman, and F. . Hussnain. “Comparative Study on Productive Performance, Egg Quality, Egg Geometry and Hatching Traits of Three Age Groups of Indigenous Peshawari Aseel Chickens”. Scientific Journal of Veterinary Advances, vol. 2, no. 2, Feb. 2013, pp. 21-25, http://sjournals.com/index.php/sjva/article/view/1473.