H∞-control with state feedback : the infinite dimensional case / by Bert van Keulen, Marc Peters and Ruth CurtainA note on hankel operators for infinite-dimensional systems / by Bert van KeulenH∞-control with measurement feedback for linear infinite-dimensional systems / by Bert van KeulenRedheffer's lemma and H∞-control or infinite-dimensional systems / by Bert van KeulenEquivalent conditions for the solvability of the infinite-dimensional LQ-problem with unbounded input and output operators / B.A.M. van KeulenH∞-control with measurement feedback for linear infinite-dimensional systems / by Bert van KeulenH∞-control for infinite-dimensional systems: a state-space approach / Bernardus Anthonius Maria van Keulen