@article{pdeconstr_pointwiseconstr,
author={Hinterm\"uller, M. and Kunisch, K.},
title="{PDE-Constrained Optimization Subject to Pointwise
Constraints on the Control, the State and its Derivative}",
language="English",
journal="SIAM Journal on Optimization",
volume="20",
number="3",
pages="1133--1156",
year="2009"
}