Volume 4, ASAT CONFLENCE 14-16 May 1991 , CAIRO, May 1991, Pages 373-382
H. NASR; M. RAMADAN
Volume 3, ASAT Conference 4-6 April 1989 , CAIRO, April 1989, Pages 43-56
H. NASR; I. A. HASSANIEN; H. M. EL-HAWARY