@inproceedings{MuMoHuLa08,
  author={R. Murrieta-Cid and R. Monroy and S. Hutchinson and J.P. Laumond},
  title={A Complexity Result for the Pursuit-Evasion Game of Maintaining Visibility of a Moving Evader},
  booktitle={Proc. IEEE International Conference on Robotics and Automation},
  pages={2657--2664},
  year={2008}}