1. V. Barbu. H∞-boundary control with state feedback; the hyperbolic case, preprint 1992.
2. Algebraic Riccati equations with non-smoothing observation arising in hyperbolic and Euler-Bernoulli equations;Flandoli;Annali di Matematica Pura et Ap-plicata, IV,1989
3. Riccati equations for hyperbolic partial differential equations with L2(0, T; L2(0,∞; Y))-Dirichlet boundary terms;Lasiecka;SIAM J. Control Optimiz.,1986
4. C. McMillan and R. Triggiani. Min-Max Game theory and algebraic Riccati equations for boundary control problems with continuous input-solution map. Part I: the stable case, to appear in Proceedings of the 3rd International Workshop-Conference on evolution Equations, Control Theory, and Biomathematics, held at Han-sur-Lesse, Belgium, October 1991, to be published by Marcel Dekker.