@INPROCEEDINGS{Volkhardt-HUMANOIDS-2011,
  author = {Volkhardt, Michael and Mueller, {\relax St}effen and Schroeter, {\relax
    Ch}ristof and Gross, Horst-Michael},
  title = {Playing Hide and Seek with a Mobile Companion Robot},
  booktitle = {IEEE-RAS Int. Conf. on Humanoid Robots (HUMANOIDS)},
  year = {2011},
  pages = {40--46},
  publisher = {IEEE}
}