Volume 31, Issue 1, June 2007, Pages 121-129
A. ABU-DEIF; L.M. NOSSAIR; M.A. EL-TAHIR; H.I.A. FARAG
Volume 31, Issue 1, June 2007, Pages 130-145
L. M. NOSSAIR; A. ABU-DEIF; M. A. EL-TAHIR; H.I. FARAG