1. Theory of Impulsive Differential Equations;Lakshmikantham,1989
2. Ordinary Differential Equations;Hale,1969
3. A Course in Functional Analysis;Conway,1990
4. On the global existence of solutions and Lyapunov functions;Kato;Ann. Mat. Pura Appl.,1967
5. Ordinary Differential Equations;Hartman,1964