McGill, E., A. Kamyab, and J.D. Firman. 2012. “Low Crude Protein Corn and Soybean Meal Diets With Amino Acid Supplementation for Broilers in the Starter Period 1. Effects of Feeding 15% Crude Protein”. International Journal of Poultry Science 11 (3): 161–165. https://doi.org/10.3923/ijps.2012.161.165.