Yan, F. and Waldroup, P. 2006. Nonphytate Phosphorus Requirement and Phosphorus Excretion of Broiler Chicks Fed Diets Composed of Normal or High Available Phosphate Corn as Influenced by Phytase Supplementation and Vitamin D Source. International Journal of Poultry Science. 5, 3 (Feb. 2006), 219–228. DOI:https://doi.org/10.3923/ijps.2006.219.228.