NADER, J. C.; KESTENBERG, A. Surgical treatment for anal fissure. Colombia Medica, [S. l.], v. 20, n. 1, p. 17–22, 1989. DOI: 10.25100/cm.v20i1.6242. Disponível em: http://colombiamedica.univalle.edu.co/index.php/comedica/article/view/6242. Acesso em: 7 dec. 2025.