Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0006-355X(99)80014-6
	subscription/membership/fee required	IOS Press	https://content.iospress.com/openurl?genre=article&issn=0006-355X&volume=35&issue=4-5&spage=325
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:10474658