Volume 15, Issue 13, December 2014, Pages 5127-5131
Volume 14, Issue 3, March 2013, Pages 1945-1949
Volume 14, Issue 3, March 2013, Pages 1989-1993
Volume 13, Issue 5, May 2012, Pages 2341-2344
Volume 12, Issue 1, January 2011, Pages 17-34
Volume 12, Issue 1, January 2011, Pages 219-222
Volume 11, Issue 3, March 2010, Pages 739-745
Volume 6, Issue 4, April 2005, Pages 510-514