1. Controllability of linear dynamical systems;Kalman;Contr. Diff. Eqs.,1963
2. Hyperstability and optimality of automatic systems with several control functions;Popov;Rev. Roumaine Sci. Techn., Electrotechn. et Energ.,1964
3. Hyperstabilitatea sistemelor automate;Popov,1966
4. On pole assignment in multi-input controllable linear systems;Wonham;Brown University. Division of Applied Mathematics, Technical Report 67-2,1967
5. On the stabilization of linear systems;Langenhop,1964