Stability for a non-local non-autonomous system of fractional order differential equations with delays. El-Sayed, Ahmed M.A.; Gaafar, Fatma M.; Hamadalla, Eman M.A. — 2010 Electronic Journal of Differential Equations (EJDE) [electronic only]
On the stability of some fractional-order non-autonomous systems. Abd El-Salam, Sheren A.; El-Sayed, Ahmed M.A. — 2007 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]