Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1573-4064&volume=1&issue=2&spage=185&aulast=Valentini
	subscription/membership/fee required	Bentham Science Publishers Ltd.	https://www.eurekaselect.com/78995/article