CETIN, A. Ultrastructure of human umbilical artery and vein . Annals of Medical Research, [S. l.], v. 26, n. 4, p. 0689–0694, 2021. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/1223. Acesso em: 18 may. 2024.