1. Anderson, B. D., andMore, J. B.,Linear Optimal Control, Prentice Hall, Englewood Cliffs, New Jersey, 1971.
2. Bensoussan, A., Delfour, M. C., andMitter, S. K.,Optimal Control of Linear Integral Equations with a Quadratic Cost Function: the Infinite Time Interval Problem, Université de Montreal, Centre de Recherches Mathématiques, Report No. 454, 1977.
3. Delfour, M. C., McCalla, C., andMitter, S. K.,Stability and the Infinite-Time Quadratic Cost Problem for Linear Hereditary Differential Systems, SIAM Journal on Control, Vol. 13, pp. 48?88, 1975.
4. Curtain, R. F.,The Infinite-Dimensional Riccati Equation with Applications to Affine Hereditary Differential Systems, SIAM Journal on Control, Vol. 13, pp. 1130?1143, 1975.
5. Zabczyk, J.,Remark on the Algebric Riccati Equation in Hilbert Space, Journal of Applied Mathematics and Optimization, Vol. 2, pp. 251?258, 1976.