Volume 12, Issue 10, October 2011, Pages 2773-2778
Volume 12, Issue 4, April 2011, Pages 889-896
Volume 12, Issue 1, January 2011, Pages 265-269
Volume 11, Issue 5, May 2010, Pages 1397-1401
Volume 7, Issue 2, February 2006, Pages 318-320
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