1. Case, J.,A Differential Game in Economics, University of Wisconsin, Mathematics Research Center, Report No. MRC-TSR-879, 1968.
2. Rosen, J. B.,Existence and Uniqueness of Equilibrium Points for Concave N-Person Games, Econometrica, Vol. 33, No. 3, 1965.
3. Lefschetz, S.,Differential Equations: Geometric Theory, John Wiley and Sons (Interscience Publishers), New York, 1957.
4. Turner, R. D.,A Heuristic Algorithm for Approximating Min-Max Strategies, Paper presented at the First International Conference on Theory and Application of Differential Games, Amherst, Massachusetts, 1969.