Volume 62, Issue 148, January 2016, Pages 48-51
ELALFY MAHMOUD; ABDEIN MOHAMED
Volume 33.2, Issue 66, July 1995, Pages 199-206
Y. ABD EL-GALIL; A.I. EL-KENAWY; S.R. EL-GMIEY; M.M. ABD EL-LATIF