References
- Shouchuan , Hu , Zhuang , W. and Khavanin , M. On the existence and uniqueness for nonlinear integro-differential equations , To appear in Jour. Math. Phy. Sciences .
- Lakshmikantham , V. and Leela , S. 1969 . Integral and differential inequalities , Vol. I and II , New York : Academic Press .
- Lakshmikantham , V. and Leela , S. 1980 . Nonlinear differential equations in abstract spaces , Oxford : Pergamon Press .
- Shoudge , G.R. 1983 . A new approach to the stability theory of functional differential systems . J.M.A.A. , 95 : 319 – 334 .