1. Nota on expanding PA+AP=-Q;Chen;IEEE Trans. Automatic Control,1968
2. Methods for solving discrete Lyapunove equation;Fang;J. Wuhan Institute of Technology,1986
3. On the determination of the optimal constant output feedback gains for linear multivariable system;Levine;IEEE Trans. Automatic Control,1970
4. Optimal limited state variable feedback controllers for linear systems;Levine;IEEE Trans. Automatic Control,1971
5. The design method of minimax performance index optimal constant output feedback, regulators;Luo;Control Tneory And Applications,1986