On the stability of a fractional-order differential equation with nonlocal initial condition. El-Sayed, A.M.A.; El-Salam, Sh.A.Abd — 2008 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Weighted Cauchy-type problem of a functional differ-integral equation. El-Sayed, A.M.A.; El-Salam, Sh.A.Abd — 2007 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]