Somkuwar, A.P., et al. “Phytase With Synergistic Herbs: An Option to Reduce Environmental Pollution by Partial Replacement of Inorganic Phosphorus in Broiler Ration”. International Journal of Poultry Science, vol. 9, no. 4, Mar. 2010, pp. 390–394, https://doi.org/10.3923/ijps.2010.390.394.