Valderrama, Carlos Eduardo2000-03-142619-60690122-4328http://hdl.handle.net/20.500.12209/4936NAapplication/pdfspahttps://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Artículo de revistaAttribution-NonCommercial 4.0 International