URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
http://dx.doi.org/10.1016/j.apergo.2008.09.007DOI Link
http://ac.els-cdn.com/S000368700800152X/1-s2.0-S00[...]11/14/2016PDF ReaderItem is within a limited-access website
http://www.sciencedirect.com/science/article/pii/S[...]10/21/2014Item is within a limited-access website