VALLS, Alberto. Cancer ulcers and superficial stomach cancer. Cirugía del Uruguay, [S. l.], v. 31, n. 5-6, p. 301–310, 2020. Disponível em: https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/1554. Acesso em: 29 mar. 2026.