Volume 15, Issue 4, April 2014, Pages 1627-1632
Volume 15, Issue 4, April 2014, Pages 1763-1766
Volume 14, Issue 11, November 2013, Pages 6301-6304
Volume 14, Issue 7, July 2013, Pages 4325-4328
Volume 14, Issue 2, February 2013, Pages 801-803
Volume 9, Issue 3, March 2008, Pages 413-416