@inproceedings{MuSaHu03,
  author={R. Murrieta-Cid and A. Sarmiento and S. Hutchinson},
  title={On the Existence of a Strategy to Maintain a Moving Target within the Sensing Range of an Observer
  Reacting with Delay},
  booktitle={Proc. IEEE/RSJ International Conference on Intelligent Robots and Systems},
  pages={1184--1191},
  year={2003}}