Peripheral nerve blocks for foot surgery. Revista Universidad de Guayaquil, [S. l.], v. 85, n. 3-4, p. 111–122, 1991. DOI: 10.53591/rug.v85i3 y 4.530. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/662. Acesso em: 5 dec. 2025.