@book{Kallweit1994,
  author    = {Kallweit, Stephan},
  title     = {Untersuchungen zur Erstellung wissensbasierter Fehlerdiagnosesysteme f{\"u}r Kreiselpumpen},
  pages     = {271 S. : zahlr. graph. Darst.},
  year      = {1994},
  language  = {de}
}
@article{KallweitDuesRadke1994,
  author    = {Kallweit, Stephan and Dues, Michael and Radke, Michael},
  title     = {M{\"o}glichkeiten und Grenzen laseroptischer Verfahren zur Untersuchung hydraulischer Str{\"o}mungsmaschinen / Dues, Michael ; Kallweit, Stephan ; Radke, Michael},
  series = {Forschung im Ingenieurwesen. 60 (1994), H. 11-12},
  journal   = {Forschung im Ingenieurwesen. 60 (1994), H. 11-12},
  isbn      = {0015-7899},
  pages     = {332 -- 336},
  year      = {1994},
  language  = {de}
}
@book{PfeifferKnepper1995,
  author    = {Pfeiffer, Johann and Knepper, Ludger},
  title     = {Diplom-Ingenieur/Diplom-Ingenieurin ( Fachhochschule ) Maschinenbau - Allgemeiner Maschinenbau},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Losebl.-Ausg.},
  year      = {1995},
  language  = {de}
}
@book{PfeifferKnepper1998,
  author    = {Pfeiffer, Johann and Knepper, Ludger},
  title     = {Diplom Ingenieur/Diplom Ingenieurin (Fachhochschule) Maschinenbau Konstruktionstechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Losebl.-Ausg.},
  year      = {1998},
  language  = {de}
}
@book{PfeifferKnepper1999,
  author    = {Pfeiffer, Johann and Knepper, Ludger},
  title     = {Diplom-Ingenieur/Diplom-Ingenieurin (Fachhochschule) Maschinenbau Energie- und W{\"a}rmetechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Losebl.-Ausg.},
  year      = {1999},
  language  = {de}
}
@article{Pfeiffer2002,
  author    = {Pfeiffer, Johann},
  title     = {Gute Chancen im Maschinenbau},
  series = {Aachener Nachrichten / Aachener Zeitung : Sonderbeil. (2002)},
  journal   = {Aachener Nachrichten / Aachener Zeitung : Sonderbeil. (2002)},
  publisher = {-},
  year      = {2002},
  language  = {de}
}
@article{Pfeiffer2002,
  author    = {Pfeiffer, Johann},
  title     = {Gute Chancen im Maschinenbau},
  series = {Rheinische Post : Sonderbeil. (2002)},
  journal   = {Rheinische Post : Sonderbeil. (2002)},
  year      = {2002},
  language  = {de}
}
@book{Pfeiffer1997,
  author    = {Pfeiffer, Johann},
  title     = {Design und Herstellen von Werkzeugen mit Freiformfl{\"a}chen},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1997},
  language  = {de}
}
@book{Pfeiffer1996,
  author    = {Pfeiffer, Johann},
  title     = {Automatisierung in der Handhabungs- und Montagetechnik},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1996},
  language  = {de}
}
@book{Pfeiffer1994,
  author    = {Pfeiffer, Johann},
  title     = {Rechnergest{\"u}tzte Auslegung von Seiltrieben - Praxisimplementierung},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1994},
  language  = {de}
}