@inproceedings{rohs2008,
  author = {Christian Kray and Michael Rohs and Jonathan Hook and Sven Kratz},
  title = {Group Coordination and Negotiation through Spatial Proximity Regions around Mobile Devices on Augmented Tabletops},
  booktitle = {3rd IEEE Workshop on Tabletops and Interactive Surfaces (IEEE Tabletop 2008)},
  year = {2008},
  month = oct,
}