Volume 25, Issue 1, January 2012, Pages 59-64
Mohammad Reza ShahNazari
Volume 14, Issue 4, November 2001, Pages 367-376
E. Yousefi; A. Baradaran Rahimi
Volume 9, Issue 2, May 1996, Pages 29-35
A. Baradaran Rahimi
Volume 6, Issue 1, February 1993, Pages 15-24
J. F. Geer