References
- Burton , T.A. 1985 . Stability and Peeeriodic Solutions of Ordinary and Functional Differential Equations , Orlando : Academic Press .
- Hale , Jack K. and Sjoerd , M. 1993 . Verduyn Lunel, Introduction to Functional Differential Equations , New York/Berlin : Spring—Verlag .
- Hino , T. , Murakami , S. and Naito , T. 1992 . Functional Differential Equations with Infinite Delay , New York/Berlin : Springer-Verlag .
- Lakshmikantham , V. and Liu , Xinzhi . 1993 . Stability Analysis in Terms of Two Measures , Singapore : World Scientific .
- Lakshmikantham , V. 1994 . Lizhi Wen and Binggen Zhang, Theory of Differential Equations with Unbounded Delay , Dordrech : Kluwer Academic Publishers .
- Liu , Xinzhi . 1992 . Boundedness and Lagrange Stability for Functional Differential Systems . Panamerican Math. J , 2 : 79 – 100 .
- Zhang , S. 1988 . Razumikhin techniques in infinite delay equations . Sci. China , 32 : 38 – 51 . (Series A)