@TechReport{Eherer92,
  author =    "Stefan Eherer (ed.) Fachgruppe Informatik",
  title =     "Jahresbericht 1991",
  institution = "RWTH Aachen",
  year =      "1992",
  number =    "AIB-01-1992",
  url =       "http://aib.informatik.rwth-aachen.de/1992/1992-01.ps.gz",
}