@book{KnepperPfeiffer1999,
  author    = {Knepper, Ludger and Pfeiffer, Johann},
  title     = {Diplom-Ingenieur / Diplom-Ingenieurin (Fachhochschule) Maschinenbau, Energie- und W{\"a}rmetechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Loseblattausg.},
  year      = {1999},
  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}
}
@book{Pfeiffer1999,
  author    = {Pfeiffer, Johann},
  title     = {Verbesserung der Qualit{\"a}t von Freiformoberfl{\"a}chen},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1999},
  language  = {de}
}
@book{Wollert1999,
  author    = {Wollert, J{\"o}rg},
  title     = {Erfolgreich automatisieren unter Microsoft Windows : Technologie, Chancen, Grenzen und L{\"o}sungen f{\"u}r Automatisierungsaufgaben unter Windows},
  publisher = {Franzis},
  address   = {Poing},
  isbn      = {3772354440},
  pages     = {346 S.},
  year      = {1999},
  language  = {de}
}
@book{Gebhardt2000,
  author    = {Gebhardt, Andreas},
  title     = {Rapid prototyping : Werkzeug f{\"u}r die schnelle Produktentstehung. - 2., v{\"o}llig {\"u}berarb. Aufl.},
  publisher = {Hanser},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {3-446-21242-6},
  pages     = {XVII, 409 S. : Ill., graph. Darst.},
  year      = {2000},
  language  = {en}
}
@book{Knepper2000,
  author    = {Knepper, Ludger},
  title     = {Staplereinsatzkonzept Rohstofflagerplatz einer Papierfabrik},
  address   = {FH Aachen},
  year      = {2000},
  language  = {de}
}
@book{Knepper2000,
  author    = {Knepper, Ludger},
  title     = {Konzeptentwicklung verkehrstechnische Organisation des Pfortenbereichs eines Industrieunternehmens},
  address   = {FH Aachen},
  year      = {2000},
  language  = {de}
}
@book{Pfeiffer2000,
  author    = {Pfeiffer, Johann},
  title     = {Genauigkeit und Qualit{\"a}t von Freiformfl{\"a}chen},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {2000},
  language  = {de}
}
@book{Knepper2001,
  author    = {Knepper, Ludger},
  title     = {Entwicklung neuer Generalbebauungsplan f{\"u}r ein Industrieunternehmen},
  address   = {FH Aachen},
  year      = {2001},
  language  = {de}
}
@book{Gauchel2002,
  author    = {Gauchel, Joachim},
  title     = {Gutachten 4-Stationen-Rundschalttisch-Pr{\"u}fautomat},
  address   = {Landgericht Hagen},
  year      = {2002},
  language  = {de}
}