Volume 12, Issue 2, February 2011, Pages 351-356
Volume 12, Issue 2, February 2011, Pages 373-376
Volume 12, Issue 1, January 2011, Pages 211-214
Volume 11, Issue 5, May 2010, Pages 1367-1372
Volume 11, Issue 2, February 2010, Pages 359-364
Volume 9, Issue 4, April 2008, Pages 625-630
Volume 9, Issue 2, February 2008, Pages 291-294
Volume 8, Issue 4, April 2007, Pages 502-506