Gallardo Saborido, Emilio José2015-11-062015-11-062006ISSN e- 1988-42730210-5810http://hdl.handle.net/11441/30477application/pdfspaAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.3989/aeamer.2006.v63.i1