1. Towards a theory of many player differential games;Case;SIAM J. Control,1969
2. A Differential Game in International Trade II;Case;MRCTSR No. 988,1969
3. Dynamic Programming and the Calculus of Variations;Dreyfus,1965
4. The Mathematical Theory of Optimal Processes;Pontryagin,1962
5. International Trade;Taussig,1929