2015-02-272015-02-2720111367-2630http://liu.diva-portal.org/smash/get/diva2:471873/FULLTEXT01.pdfhttp://hdl.handle.net/11441/23024engAtribución-NoComercial-SinDerivadas 4.0 Españahttp://creativecommons.org/licenses/by-nc-nd/4.0info:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://idus.us.es/xmlui/handle/11441/23024