@TechReport{JarkeEhererGallersdoerferJeusfeldStaudt93,
  author =    "Matthias Jarke and Stefan Eherer and Rainer Gallersdoerfer and
           Manfred A. Jeusfeld and Martin Staudt",
  title =     "Concept{B}ase - {A} {D}eductive {O}bject {B}ase {M}anager",
  institution = "RWTH Aachen",
  year =      "1993",
  number =    "AIB-14-1993",
  url =       "http://aib.informatik.rwth-aachen.de/1993/1993-14.ps.gz",
}