1. Riccati Differential Equations;Reid,1972
2. Disconjugacy;Coppel,1971
3. Optimal synthesis of linear sampling control systems using generalized performance indexes;Kalman;Tran Am. Soc. Mech. Eng.,1958
4. Optimum Design of Digital Control Systems;Tou,1963
5. Time-Varying Discrete Linear Systems: Input-Output Operators. Riccati Equations. Disturbance Attenuation;Halanay,1994