Volume 13, Issue 3, March 2012, Pages 891-896
Volume 13, Issue 3, March 2012, Pages 975-978
Volume 12, Issue 10, October 2011, Pages 2649-2652
Volume 12, Issue 2, February 2011, Pages 465-470
Volume 11, Issue 2, February 2010, Pages 359-364
Volume 6, Issue 2, February 2005, Pages 139-142
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