Volume 16, Issue 15, December 2015, Pages 6267-6272
Volume 15, Issue 14, December 2014, Pages 5681-5684
Volume 14, Issue 6, June 2013, Pages 3963-3967
Volume 6, Issue 4, April 2005, Pages 531-534
Volume 5, Issue 3, March 2004, Pages 301-302
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