1. Theory of Functional Differential Equations;Hale,1977
2. Differential-Difference Equations;Bellman,1963
3. A Liapunov functional for a matrix difference-differential equation;Infante;J. Differential Equations,1978
4. Introduction to Theory and Application of the Laplace Transformation;Doetsch,1974
5. Complex Analysis;Serge,1977