WICHENDU, P. N.; AMADI, C. Relationship between plasma calcium and carcinoembryonic antigen among colorectal cancer patients. International Surgery Journal, [S. l.], v. 5, n. 6, p. 1995–1999, 2018. DOI: 10.18203/2349-2902.isj20182209. Disponível em: https://www.ijsurgery.com/index.php/isj/article/view/2879. Acesso em: 7 nov. 2025.