Romero Bejarano, Hilario José2020-09-302020-09-3020091988-3536https://hdl.handle.net/11441/101615application/pdf17 p.spaAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess