Cerrate, Sandro, and Park Waldroup. “Maximum Profit Feed Formulation of Broilers: 1. Development of a Feeding Program Model to Predict Profitability Using Non Linear Programming”. International Journal of Poultry Science, vol. 8, no. 3, Feb. 2009, pp. 205–215, https://doi.org/10.3923/ijps.2009.205.215.