Chen, Y.P., W.G. Duan, L.L. Wang, S.L. Zhang, and Y.M. Zhou. 2013. “Effects of Thermostable Phytase Supplementation on the Growth Performance and Nutrient Digestibility of Broilers”. International Journal of Poultry Science 12 (8): 441–444. https://doi.org/10.3923/ijps.2013.441.444.