1. A. Blaquiere, F. Gerard and G. Leitmann, Quantitative and Qualitative Games, Academic Press, New York, 1969.
2. A.E. Bryson and Y.C. Ho, Applied Optimal Control, Blaisdell, Waltham, Massachusetts, 1969.
3. R.G. Cottrell, Optimal Intercept Guidance for Short-Range Tactical Missiles, AIAA Journal, Vol. 9, No.7, 1414–1415, 1971.
4. W.J. Grantham and T.L. Vincent, A Controllability Minimum Principle, Journal of Optimization Theory and Applications, 1974, (In print).
5. Rufus Isaacs, Differential Games, John Wiley and Sons, Inc., New York, 1965.