Volume 12, Issue 1, January 2011, Pages 125-130
Volume 11, Issue 6, June 2010, Pages 1575-1579
Volume 11, Issue 4, April 2010, Pages 943-951
Volume 11, Issue 1, January 2010, Pages 79-90
Volume 9, Issue 4, April 2008, Pages 557-562
Volume 9, Issue 3, March 2008, Pages 487-490
Volume 8, Issue 1, January 2007, Pages 77-82
Volume 6, Issue 2, February 2005, Pages 189-194
)