Acute under back pain. A clinical therapeutic approach. Revista Universidad de Guayaquil, [S. l.], v. 115, n. 1, p. 59–62, 2013. DOI: 10.53591/rug.v115i1.476. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/458. Acesso em: 5 dec. 2025.