@proceedings{Irrgang1990,
  editor    = {Bernhard Irrgang and Jörg Klawitter},
  title     = {{Künstliche Intelligenz}},
  year      = 1990,
  publisher = {Hirzel, Wiss. Verl.-Ges.},
  address   = {Stuttgart},
  series    = {Edition Universitas},
  ISBN ={3-8047-1122-7},
}