1. Mimimal Effort Control Systems with an Upper Bound of the Control Time;Aoki;IEEE Trans. Automat. Control,1963
2. “Adaptive Control Processes, a Guided Tour.”;Bellman,1961
3. “Dynamic Programming.”;Bellman,1957
4. On the “Bang-Bang” control problems;Bellman;Quart. Appl. Math.,1956
5. Variational Methods in Problems of Control and Programming;Berkovitz;J. Math. Anal. Appl.,1961