Pérez, Fernando2013-03-02http://revistas.pucp.edu.pe/index.php/ayd/article/view/19666/19749No presenta resumen.application/pdfspainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/articlehttps://purl.org/pe-repo/ocde/ford#6.04.00