Volume 25, Issue 4, October 2002, Pages 41-57
E. E. El-kholy; S. S. shokralla; A. H. Morsi; Said A. El-Absawy
Volume 24, Issue 4, October 2001, Pages 217-231
M. El-shebiny; E. E. El-kholy; A. El-hefnawy; Esam A. Wadan