Name	Info	Provider	Link
	free resource	Optica Publishing Group	https://opg.optica.org/abstract.cfm?URI=oe-25-12-13714
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:28788914
	free resource	scite Smart Citations	https://scite.ai/reports/28788914
	free resource	Spiral, Imperial College Digital Repository	http://hdl.handle.net/10044/1/48274