@INPROCEEDINGS{Kessler-ECMR-2013,
  author = {Kessler, Jens and Schmidt, Matthias and Helsper, Sandra and Gross,
    Horst-Michael},
  title = {I'm Still Watching You: Update on Observing a Person in a Home Environment},
  booktitle = {Europ. Conf. on Mobile Robots (ECMR)},
  year = {2013}
}