Volume 20, Issue 2, June 2007, Pages 169-182
Neetu Singh; G. C. Sharma; Madhu Jain
Volume 17, Issue 2, June 2004, Pages 119-130
K. Ansari; A. Cheldavi
Volume 12, Issue 3, August 1999, Pages 155-164
R. P. Ghimire; Madhu Jain