Volume 16, Issue 15, December 2015, Pages 6375-6379
Volume 15, Issue 12, December 2014, Pages 4929-4932
Volume 15, Issue 1, January 2014, Pages 191-193
Volume 15, Issue 1, January 2014, Pages 281-286
Volume 12, Issue 6, June 2011, Pages 1457-1462
)