1. Unified boundedness, periodicity, and stability in ordinary and functional differential equations;Burton;Ann. Mat. Pura Appl.,1986
2. Unified stability theorem in RFDE and NFDE;Zhang;J. Math. Anal. Appl.,1990
3. Razumikhin techniques in infinite delay equations;Zhang;Science in China (Series A),1989
4. A new device in study of stability theory;Li;Hunan Annals of Mathematics,1990
5. A new approach to stability theory of functional differential equations;Zhang;Ann. of Diff. Eqns.,1995