References
[1]. L. Berezansky and E. Braverman. (2006). On stability of some linear and nonlinear delay differential equations, J. Math.
Anal. Appl.,314, 9-15.
[2]. A.El-Sayed, A.El-Mesiry and H. EL-Saka. (2007). On the fractional-order logistic equation, Applied Mathematics Letters,
20, 817-823.
[3]. A. M. A. El-Sayed and M. E. Nasr. (2011). Existence of uniformly stable solutions of nonautonomous discontinuous
dynamical systems, J. Egypt Math. Soc. Vol. 19(1).
[4]. H.EL-Saka, E. Ahmed, M. I. Shehata, A. M. A. El-Sayed. (2009). On stability, persistence, and Hopf bifurcation in fractional
order dynamical systems, Nonlinear Dyn, 56, 121-126.
[5]. J.Hale, S.M. Verduyn Lunel. (1993). Introduction to functional differential equations, Springer-Verlag, New York.
[6]. Y.Hamaya and A. Redkina. (2006). On global asymptotic stability of nonlinear stochastic difference equations with
delays, Internat. J.Diff., 1, 101-118.
[7]. Y. Kuang. (1993). Dely differential equations with applications in population dynamics, Aca-demic Press, New York.
[8]. J.D. Murray. (2002). Mathematical Biology I: An Introduction, Springer-Verlag, Berlin, 3rd edition.
