Name	Info	Provider	Link
	subscription/membership/fee required	American Physical Society	https://link.aps.org/abstract/PRL/v126/p241102
Free full Text at ORBi	free resource	ORBi (University of Liege)	https://hdl.handle.net/2268/261466
	free resource	Bicocca Open Archive UniMiB (BOA)	https://hdl.handle.net/10281/326063
	free resource	Strathprints - the University of Strathclyde	https://strathprints.strath.ac.uk/77411/