Volume 12, Issue 12, December 2011, Pages 3221-3228
Volume 10, Issue 5, May 2009, Pages 827-831
Volume 8, Issue 4, April 2007, Pages 578-582
Volume 7, Issue 3, March 2006, Pages 467-471
Volume 5, Issue 3, March 2004, Pages 253-258
Volume 3, Issue 2, February 2002, Pages 163-166
Volume 2, Issue 3, March 2001, Pages 165-177
Volume 1, Issue 3, March 2000, Pages 213-218