@INPROCEEDINGS{Volkhardt-ECMR-2013b,
  author = {Volkhardt, Michael and Weinrich, {\relax Ch}ristoph and Gross, Horst-Michael},
  title = {Multi-Modal People Tracking on a Mobile Companion Robot},
  booktitle = {Europ. Conf. on Mobile Robots (ECMR)},
  year = {2013}
}