1. Courant, R., andHilbert, D.,Methods of Mathematical Physics, Vol. 1, John Wiley and Sons (Interscience Publishers), New York, 1966.
2. Bellman, R.,Introduction to the Mathematical Theory of Control Processes, Academic Press, New York, 1967.
3. Middleton, D.,Topics in Communication Theory, McGraw-Hill Book Company, New York, 1965.
4. Kagiwada, H., andKalaba, R.,Verification of the Invariant Imbedding Method for Certain Fredholm Integral Equations, Journal of Mathematical Analysis and Applications, Vol. 23, No. 3, 1968.
5. Kagiwada, H., andKalaba, R.,Derivation and Validation of an Initial Value Method for Certain Nonlinear Two-Point Boundary-Value Problems, Journal of Optimization Theory and Applications, Vol. 2, No. 2, 1968.