Volume 48, Issue 3, May and June 2021, Pages 817-827
Abdo Sh. Hassan; A. M. Helal; A. A. El-Darawany; Ayyat M. Salah
Volume 45, Issue 3, May 2018, Pages 821-833
Naglaa Qabil; A. A. Helal; Rasha Y.S. Abd El-Khalek