Volume 41.2, Issue 82, July 1999, Pages 63-71
A. Mandour; M.H. Kotkat; Kh. Khilo
Volume 41.2, Issue 82, July 1999, Pages 72-87
A. Mandour; S. Hedaya; Y. Dowidar
Volume 39.2, Issue 78, July 1998, Pages 238-244
M. Korshom; A. Abdel Mogheney; A. Mandour