@book{Baatz1985,
  author    = {Baatz, Udo},
  title     = {CAD/CAM im Maschinenbau - wohin geht der Weg?},
  address   = {M{\"u}lheim a.d. Ruhr},
  year      = {1985},
  language  = {de}
}
@book{Baatz1985,
  author    = {Baatz, Udo},
  title     = {Nutzwertanalyse von CAD - Systemen der unteren und mittleren Preisklasse f{\"u}r dem Maschinenbau},
  address   = {M{\"u}lheim a.d. Ruhr},
  year      = {1985},
  language  = {de}
}