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	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0007-1323&date=1994&volume=81&issue=4&spage=598
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:8205446
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/bjs/article-lookup/doi/10.1002/bjs.1800810439