Volume 14, Issue 1, January 2013, Pages 179-182
Volume 13, Issue 12, December 2012, Pages 6005-6010
Volume 13, Issue 12, December 2012, Pages 6269-6272
Volume 12, Issue 11, November 2011, Pages 2887-2892
Volume 12, Issue 1, January 2011, Pages 309-311
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