Modifications to the sugiura futagawa technique. Revista Universidad de Guayaquil, [S. l.], v. 66, n. 4, p. 73–78, 1986. DOI: 10.53591/rug.v66i4.1128. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/847. Acesso em: 15 dec. 2025.