Volume 50, Issue 2, June 2019, Pages 219-228
A. A.B. Masoud; F. E. Ibraheem; O. A. Khodair
Volume 46, Issue 2, April 2015, Pages 71-79
Volume 46, Issue 2, April 2015, Pages 107-119
Volume 38, Issue 1, March 2007, Pages 63-73
M.M Harhash; R. S.Al-Obeed