SIERRA M., Darío Alberto. Bloodless removal of residual gallstones. Treatment of seventy patients. Medicina UPB, [S. l.], v. 1, n. 3, p. 33–47, 1982. Disponível em: https://revistas.upb.edu.co/index.php/medicina/article/view/6610. Acesso em: 12 aug. 2026.