Volume 16, Issue 7, July 2015, Pages 2981-2986
Volume 15, Issue 1, January 2014, Pages 123-127
Volume 14, Issue 7, July 2013, Pages 4015-4023
Volume 14, Issue 5, May 2013, Pages 2723-2729
Volume 14, Issue 2, February 2013, Pages 993-996
Volume 13, Issue 1, January 2012, Pages 33-35
Volume 12, Issue 3, March 2011, Pages 787-790