JOERLING, J.; DOLL, K. Monitoring of iron deficiency in calves by determination of serum ferritin in comparison with serum iron: A preliminary study. Open Veterinary Journal, [S. l.], v. 9, n. 2, p. 177–184, 2019. DOI: 10.4314/ovj.v9i2.14. Disponível em: https://www.ajol.info/index.php/ovj/article/view/187880. Acesso em: 7 oct. 2026.