Name	Info	Provider	Link
	subscription/membership/fee required	Optica Publishing Group	https://opg.optica.org/abstract.cfm?URI=ol-30-11-1342
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/15981527/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/15981527
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:15981527