Sari, M., Onol, A. G., Daskiran, M., & Cengiz , O. (2012). Egg Production and Calcium-Phosphorus Utilization of Laying Hens Fed Diets Supplemented with Phytase Alone or in Combination with Organic Acid. International Journal of Poultry Science, 11(3), 181–189. https://doi.org/10.3923/ijps.2012.181.189