@article{EJDE_2010__2010__a1,
     author = {El-Sayed,  Ahmed M.A. and Gaafar,  Fatma M. and Hamadalla,  Eman M.A.},
     title = {Stability for a non-local non-autonomous system of fractional order differential equations with delays},
     journal = {Electronic journal of differential equations},
     year = {2010},
     volume = {2010},
     zbl = {1188.34107},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2010__2010__a1/}
}