1. Applied Optimal Control;Bryson,1969
2. On design of a bounded control in oscillatory systems;Chernous'ko;Prikl. Mat. Mekh.,1988
3. On the complete controllability of linear dynamical systems;Ovseyevich;Prikl. Mat. Mekh.,1989
4. An estimate of the magnitude of the control in a linear problem with a quadratic functional;Sokolov;Prikl. Mat. Mekh.,1990
5. The Stability of Non-linear Controllable Systems;Letov,1962