Volume 13, Issue 3, March 2012, Pages 761-766
Volume 13, Issue 1, January 2012, Pages 319-323
Volume 12, Issue 11, November 2011, Pages 2901-2907
Volume 12, Issue 10, October 2011, Pages 2705-2711
Volume 12, Issue 3, March 2011, Pages 739-742
Volume 10, Issue 4, April 2009, Pages 699-700
Volume 10, Issue 3, March 2009, Pages 479-482
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