Volume 17.2, Issue 34, September 1986, Pages 54-61
G. KAMEL; R. SCHWARZ; A.M.A. ALI
Volume 15.1, Issue 29, September 1985, Pages 65-71
M.A.A. AHMED; R. SCHWARZ; M.R. FATH EL-BAB
Volume 14.2, Issue 28, May 1985, Pages 19-26
M.A.A. AHMED; R. SCHWARZ; M.R. FATH EL-BAB