Effect of Citric Acid, Phytase and Calcium in Diets of Laying Hens on Productive Performance, Digestibility and Mineral Excretion

L.M. Vargas-Rodriguez, J.G. Herrera, E.J. Morales, J.L. Arcos-Garcia, R. Lopez-Pozos and G. Ruelas

International Journal of Poultry Science 14 ( 4 ): 222 - 228 , 2015