1. Optimal Filtering;Anderson,1979
2. Optimal filtering for singular systems using orthogonal transformations;Bassong-Onana;Control Theory Adv. Tech.,1992
3. The optimal projection equations for reduced-order state estimation;Bernstein;IEEE Trans. Automat. Control,1985
4. Reduced order H∞ filtering;Bettayeb,1994
5. Linear Matrix Inequalities in System and Control Theory. SIAM Studies in Applied Mathematics;Boyd,1994