Volume 15, Issue 2, November and December 2007, Pages 63-72
A. Salehi; Gh. Zarshenas
Volume 13, Issue 1, March and April 2004, Pages 49-60
M. Safaei; E. Kamrani; M. Momeni
Volume 8, Issue 1, May and June 1999, Pages 71-83
E. Kamrani; S. Behzadi