Volume 16, Issue 8, August 2015, Pages 3457-3461
Volume 15, Issue 24, December 2014, Pages 10985-10989
Volume 15, Issue 6, June 2014, Pages 2747-2751
Volume 13, Issue 12, December 2012, Pages 6187-6190
Volume 12, Issue 4, April 2011, Pages 963-966
Volume 11, Issue 6, June 2010, Pages 1601-1604
)