DÍAZ CRUZ, A., E. ÁVILA GONZÁLEZ, B. FUENTE MARTÍNEZ, and J. LECUMBERRI LÓPEZ. “Digestible Lysine and Sulfur Amino Acids Requirements in White Leghorn Hens”. Veterinaria México OA, vol. 36, no. 002, Oct. 2009, https://veterinariamexico.fmvz.unam.mx/index.php/vet/article/view/134.