1. Almost necessary and sufficient conditions for survival of species;Ahmad;Nonlinear Anal. RWA,2004
2. Dichotomies and almost periodicity of the solutions of systems of impulsive differential equations;Bainov;Dynam. Syst. Appl.,1996
3. On delay differential equation with impulses;Gopalsamy;J. Math. Anal. Appl.,1989
4. Oscillation and global attractivity in a periodic delay equation;Graef;Canad. Math. Bull.,1996
5. Theory of Impulsive Differential Equations;Lakshmikantham,1989