URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
http://dx.doi.org/10.1046/j.1469-8137.2001.00109.xDOI Link
http://www.jstor.org/stable/view/135374107/16/2014Item is within a limited-access website
http://www.jstor.org/stable/pdfplus/1353741.pdf07/16/2014PDF ReaderItem is within a limited-access website