Olgun, O., and A. Önder Yıldız. “Effects of Diets Including Different Levels of Protein and Supplemented With Probiotic-Enzyme on Performance and Eggshell Quality of Laying Quails”. Turkish Journal of Agriculture - Food Science and Technology, vol. 2, no. 5, May 2014, pp. 236-41, doi:10.24925/turjaf.v2i5.236-241.130.