Volume 15, Issue 14, December 2014, Pages 5729-5732
Volume 14, Issue 12, December 2013, Pages 7075-7080
Volume 14, Issue 6, June 2013, Pages 3877-3880
Volume 14, Issue 5, May 2013, Pages 2925-2929
Volume 10, Issue 4, April 2009, Pages 685-690