Roberson, K.D., J.L. Kalbfleisch, W. Pan, T.J. Applegate, and D.S. Rosenstein. 2005. “Comparison of Wheat Bran Phytase and a Commercially Available Phytase on Turkey Tom Performance and Litter Phosphorus Content”. International Journal of Poultry Science 4 (5): 244–249. https://doi.org/10.3923/ijps.2005.244.249.