1. Observing the state of a linear system;Luenberger;IEEE Trans. Military Electronics,1964
2. Observers for multivariable systems;Luenberger;IEEE Trans. Aut. Control,1966
3. An introduction to observers;Luenberger;IEEE Trans. Aut. Control,1971
4. Linear Optimal Control;Anderson,1971
5. The synthesis of regulator logic using state-variable concepts;Bryson,1970