Volume 25, Issue 1, January 2012, Pages 1-10
A. Goel; Mahesh Pal
Volume 22, Issue 4, November 2009, Pages 351-358
A. Goel
Volume 21, Issue 3, October 2008, Pages 249-256
A. Goel
Volume 17, Issue 1, February 2004, Pages 1-10
A. Goel; Vipun Rai; D.V.S. Verma