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	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0304-4165(17)30027-2
Full text from	free resource	CORE	https://core.ac.uk/reader/77981361?utm_source=linkout
	free resource	scite Smart Citations	https://scite.ai/reports/28130153