Volume 68, Issue 2, September 2023, Pages 111-129
Helmy Sakr; Islam Otify; Rezk R Ayyad; Alaa Elwan
Volume 66, Issue 2, September and October 2022, Pages 99-125
Mohamed El-Zahabi; Yahia Amin; Helmy Sakr; Omar El-Hady
Volume 65, Issue 1, March and April 2022, Pages 50-63
Helmy Sakr