Volume 16, Issue 8, August 2015, Pages 3285-3291
Volume 14, Issue 9, September 2013, Pages 5483-5487
Volume 13, Issue 12, December 2012, Pages 6385-6390
Volume 13, Issue 8, August 2012, Pages 3601-3604
Volume 12, Issue 9, September 2011, Pages 2237-2243