@InProceedings{coutovale-mast:2013:SIGDIAL,
  author    = {Couto Vale, Daniel  and  Mast, Vivien},
  title     = {Tacit Social Contracts for Wheelchairs},
  booktitle = {Proceedings of the SIGDIAL 2013 Conference},
  month     = {August},
  year      = {2013},
  address   = {Metz, France},
  publisher = {Association for Computational Linguistics},
  pages     = {294--303},
  url       = {http://www.aclweb.org/anthology/W13-4044}
}