Volume 16, Issue 1, January 2015, Pages 373-376
Volume 15, Issue 24, December 2014, Pages 10779-10782
Volume 13, Issue 5, May 2012, Pages 1841-1844
Volume 7, Issue 2, February 2006, Pages 267-273
Volume 5, Issue 2, February 2004, Pages 175-182
Volume 1, Issue 4, April 2000, Pages 269-276