Urdaneta Rincón, María, and Steven Leeson. 1. “Evaluation of Varied Dietary Crude Protein and Lysine Level at 5.7% of Crude Protein on Productive Parameters in Broiler Chickens”. Revista Científica De La Facultad De Ciencias Veterinarias 18 (2). http://www.produccioncientifica.luz.edu.ve/index.php/cientifica/article/view/15352.