López Menudo, Francisco2015-09-292015-09-2920061130-376Xhttp://hdl.handle.net/11441/28947application/pdfspaAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess