Volume 2018, Issue 12, November and December 2018, Pages 125-143
Nora Hilal; Nora M. Hilal; O. E. Mostafa
Volume 2014, Issue 6, May and June 2014, Pages 1-6
E. M. Khalil; A. B. Farag; Kh. El-Nagar; A. I. Shehata; R. A. Ellaithy
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