1. The Mathematical Theory of Optimal Processes;Pontryagin,1962
2. Calculus of Variations and Optimal Control Theory;Hesteness,1966
3. Theory of Optimal Control of Distributed Parameter Systems, Moscow;Butkovskii,1965
4. Control of Distribute Parameter Systems in Advances in Control Systems;Wang,1964
5. Optimization Theory and Applications;Cesari,1981