URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
http://dx.doi.org/10.4236/ajps.2013.412303DOI Link
http://file.scirp.org/pdf/AJPS_2013122616114945.pdf4/10/2017PDF Reader
http://file.scirp.org/Html/22-2601127_41295.htm4/4/2017