Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1386-2073&volume=4&issue=5&spage=385&aulast=Van Regenmortel
	subscription/membership/fee required	Bentham Science Publishers Ltd.	https://www.eurekaselect.com/65228/article