Volume 15, Issue 1, January 2014, Pages 331-334
Volume 14, Issue 11, November 2013, Pages 6337-6340
Volume 14, Issue 6, June 2013, Pages 3705-3709
Volume 14, Issue 3, March 2013, Pages 1743-1746
Volume 13, Issue 11, November 2012, Pages 5381-5384
Volume 13, Issue 11, November 2012, Pages 5897-5901
Volume 12, Issue 9, September 2011, Pages 2183-2188
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