@inproceedings{DietzWiddershoven91,
  author	= {Dietz, J. L. G. and Widdershoven, G. A. M.},
  editor	= {Bannon, L. and Robinson, M. and Schmidt, K.},
  title		= {Speech Acts or Communicative Action?},
  booktitle	= {Proceedings of the Second European Conference on Computer Supported Cooperative Work (ECSCW'91)},
  year		= {1991},
  address	= {Dordrecht},
  publisher	= {Kluwer}
}