1. and , Theory of Oscillators, Dover, New York, 1987. (Reprint from 1966; Russian original, 1937.)
2. Gewöhnliche Differentialgleichungen, Springer Verlag, Berlin, 1979.
3. and , Differential Inclusions, Springer Verlag, New York, 1984.
4. and , The Numerical Solution of Nonlinear Problems, Clarendon Press, Oxford, 1981.
5. Classical Network Theory, Holden-Day, San Francisco, 1968.