PÉREZ, L. A.; GAMBOA SALINAS, J. M. Quality in service, a potential foundation of competitiveness in the informal market of shoes. Espirales Revista Multidisciplinaria de investigación, [S. l.], v. 4, n. 32, p. 36–49, 2020. DOI: 10.31876/er.v4i32.710. Disponível em: https://revistaespirales.com/index.php/es/article/view/710. Acesso em: 20 apr. 2026.