1. An operator theoretic formulation of a class of control problems and a steepest descent method of solution;Balakrishnan;J.SIAM Control Al,1963
2. Theory of optimal control of DPS;Butkovskij,1965
3. Solutions of partial derivatives optimal control problems by multi-level control techniques;Grateloup,1974
4. Integrated system identification and optimization via quasilinearization;Haimes;J.Optimization Theory and Aplication,1971
5. Integrated System Identification and Optimization;Haimes,1973