Volume 26, Issue 1, July 2007, Pages 49-63
H. Moharrami; M.T. Shahrabi Farahani and H. Shourabi
Volume 21, Issue 1, July 2002, Pages 29-41
R. Keypour; H. Seifi; A. Yazdian
Volume 20, Issue 2, April 2001, Pages 93-106
M. Saffarzadeh and Gh. Masoumi