1. N.N. Ahmed, Finite-time null controllability for a class of linear evolution equations on a Banach space with control constraints, JOTA, 47/2, 129–158, (1985).
2. A.V. Balakrishnan, Applied functional analysis, Springer-Verlag 1976.
3. C.M. Dafermos, Contraction semigroup and trend to equilibrium in continuum mechanics, in Applications of Functional Analysis to Problems in Mechanics (Springer, 1976).
4. G.W. Desch and R.C. Grimmer, Initial boundary value problems for integro-differential equations, J. of Int. Eq., to appear.
5. R.F. Curtain, Finite dimensional compensators for some hyperbolic systems with boundary control; Control theory for distributed parameter systems and applications, Lecture Notes in Control and Information Sciences 54, Springer (1983), 77–92.