1. Theory of Ordinary Differential Equations;Coddington,1955
2. Differential Games;Friedman,1971
3. Differential Equations with Discontinuous Right-hand Sides;Filippov,1988
4. Vorlesungen uber reelle Funktionen;Carathéodory,1918
5. Vorlesungen uber reelle Funktionen;Carathéodory,1968