@INPROCEEDINGS{Bellotto2013a,
  author = {N. Bellotto and M. Hanheide and N. {Van de Weghe}},
  title = {Qualitative Design and Implementation of Human-Robot Spatial Interactions},
  booktitle = {Proc. of Int. Conf. on Social Robotics (ICSR)},
  year = {2013},
  pages = {331-340}
}