@techreport{Streitz-etal89-gmd,
  author	= {Streitz, N. A. and Hannemann, J. and Th{\"u}ring, M.},
  year		= {1989},
  title		= {From ideas and arguments to Hyperdocuments: travelling through activity spaces},
  number	= {Arbeitspapiere der GMD 402},
  address	= {Darmstadt},
  institution	= {GMD/IPSI}
}