2015-01-202015-01-201987http://dspace.unia.es/bitstream/handle/10334/574/08JVIITII.pdf?sequence=1http://hdl.handle.net/11441/18082spahttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess