(:notitlegroup:)

   @inproceedings{kuwata2011,
    title     = {Safe Maritime Navigation with COLREGS Using Velocity Obstacles},
    booktitle = {2011 IEEE/RSJ International Conference on Intelligent Robots and Systems},
    author    = {Yoshiaki Kuwata and Michael T. Wolf and Dimitri Zarzhitsky and Terrance L.
                 Huntsberger},
    pages     = {4728-4734},
    month     = {September},
    year      = {2011}}