Volume 15, Issue 16, December 2014, Pages 6781-6785
Volume 15, Issue 10, October 2014, Pages 4143-4145
Volume 14, Issue 12, December 2013, Pages 7133-7136
Volume 14, Issue 4, April 2013, Pages 2567-2670
Volume 14, Issue 1, January 2013, Pages 159-163