1. Uniform asymptotic stability in functional differential equations;Burton,1978
2. Stability and Periodic Solutions of Ordinary and Functional Differential Equations;Burton,1985
3. T. A. Burton and L. Hatvani, Stability theorems for non-autonomous functional differential equations by Liapunov functionals, Tôhoku Math. J., in press.
4. Unified boundedness, periodicity, and stability in ordinary and functional differential equations;Burton;Anal. Mat. Pur. Appl.,1986
5. Stability conditions for linear non-autonomous delay differential equations;Busenberg;Quart. Appl. Math.,1984