Volume 14, Issue 1, January 2013, Pages 571-578
Volume 13, Issue 9, September 2012, Pages 4311-4314
Volume 13, Issue 4, April 2012, Pages 1495-1504
Volume 13, Issue 1, January 2012, Pages 49-56
Volume 12, Issue 10, October 2011, Pages 2523-2529
Volume 10, Issue 4, April 2009, Pages 605-608
Volume 9, Issue 4, April 2008, Pages 601-604
Volume 8, Issue 1, January 2007, Pages 77-82
)