Improvement of the blood characteristics of the broiler chickens by addition tryptophan acid supplement levels in ration. Baghdad Science Journal, Iraq, Baghdad, v. 9, n. 1, p. 45–49, 2012. DOI: 10.21123/bsj.2012.9.1.45-49. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1331.. Acesso em: 6 may. 2024.