@INPROCEEDINGS{Volkhardt-ICIRA-2011,
  author = {Volkhardt, Michael and Mueller, {\relax St}effen and Schroeter, {\relax
    Ch}ristof and Gross, Horst-Michael},
  title = {Detection of Lounging People with a Mobile Robot Companion},
  booktitle = {Intelligent Robotics and Applications (ICIRA)},
  year = {2011},
  pages = {328--337},
  volume = {7102},
  number = {2},
  series = {LNCS},
  publisher = {Springer}
}