Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=0929-8673&volume=13&issue=19&spage=2253&aulast=González
	subscription/membership/fee required	Bentham Science Publishers Ltd.	https://www.eurekaselect.com/57662/article