1. When is a linear control system optimal?;Kalman;Trans. ASME J. of Basic Engineering,1964
2. Distinctive problems of process control;Rosenbrock;Chem. Eng. Prog.,1962
3. On pole assignment in multi-input controllable linear systems;Wonham,1967
4. Design of multi-variable feedback systems;Anderson,1967
5. On the general theory of control systems;Kalman,1961