1. Variational methods in problems of control and programming;Berkovitz;J. Math. Anal. Appl.,1961
2. Multiplier and gradient methods;Hestenes;J. Optimiz. Theory and Appl.,1969
3. On convergence control in differential dynamic programming applied to realistic aircraft and differential game problems;Järmark,1977
4. New approaches to the numerical solution of optimal control problems;Martensson,1972
5. A constraining hyperplane technique for state variable constrained optimal control problems;Martensson;Trans. ASME, J. Dynamic Systems, Measurement, and Control,1973