Volume 13, Issue 7, July 2012, Pages 3399-3402
Volume 13, Issue 1, January 2012, Pages 87-90
Volume 12, Issue 6, June 2011, Pages 1573-1580
Volume 12, Issue 5, May 2011, Pages 1341-1345
Volume 10, Issue 2, February 2009, Pages 251-257
Volume 9, Issue 1, January 2008, Pages 101-106
Volume 7, Issue 3, March 2006, Pages 431-433