Volume 47.2, Issue 94, July 2002, Pages 249-262
M.N. Naffif; S.A. Amer; S.A. Osman
Volume 47.2, Issue 94, July 2002, Pages 263-278
S.A. Osman; S.A. Amer; A.A. Abou-Rawash; A.F. Mehrez