El-Sayed A. M. A.; Hashem H. H. G.: Addendum to integrable and continuous solutions of a nonlinear quadratic integral equation. (2009)
El-Sayed A. M. A.; Hashem H. H. G.: Monotonic solutions of functional integral and differential equations of fractional order. (2009)
El-Sayed A. M. A.; Hashem H. H. G.: Integrable and continuous solutions of a nonlinear quadratic integral equation. (2008)
El-Sayed A. M. A.; Abd El-Salam Sh. A.: On the stability of a fractional-order differential equation with nonlocal initial condition. (2008)
El-Sayed A. M. A.: Stability of a monotonic solution of a non-autonomous multidimensional delay differential equation of arbitrary (fractional) order. (2008)
El-Sayed A. M. A.; El-Salam Sheren A. Abd: Weighted Cauchy-type problem of a functional differ-integral equation. (2007)