Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0035-9203(11)00205-7
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:22137538
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/trstmh/article-lookup/doi/10.1016/j.trstmh.2011.10.001