González Siguero, Roberto2026-02-252018-05-0120182018-05-012018978849749680310.17979/spudc.9788497496803.121https://pepa.une.es/handle/123456789/65738Formato fijopp. 121-127Creative Commons Attribution 4.0 International (CC BY 4.0)Creative Commons Attribution 4.0 International (CC BY 4.0)http://creativecommons.org/licenses/by/4.0/openAccess