Volume 16, Issue 12, December 2015, Pages 4987-4991
Volume 16, Issue 2, February 2015, Pages 675-678
Volume 15, Issue 15, December 2014, Pages 6349-6352
Volume 14, Issue 12, December 2013, Pages 7331-7333
Volume 14, Issue 4, April 2013, Pages 2191-2199
Volume 4, Issue 3, March 2003, Pages 239-246