@inproceedings{SaMuHu05,
  author={T. Muppirala and R. Murrieta-Cid and S. Hutchinson},
  title={Optimal Motion Strategies Based on Critical Events to Mantain
Visibility of a Moving Target},
  booktitle={Proc. IEEE International Conference on Robotics and Automation},
  pages={3826--3831},
  year={2005}}