Name	Info	Provider	Link
	subscription/membership/fee required	HighWire	https://doi.org/10.1891/jnum.2005.13.2.87
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1061-3749&volume=13&issue=2&spage=87&aulast=Sousa
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16401040.ui