@book{HeinrichsWeckVonderhagen1981,
  author    = {Heinrichs, Horst and Weck, M. and Vonderhagen, H.},
  title     = {CAD-Programmbibliothek f{\"u}r Großrechneranlagen},
  address   = {Aachen},
  year      = {1981},
  language  = {de}
}
@book{HeinrichsWeckGillessen1977,
  author    = {Heinrichs, Horst and Weck, H. and Gillessen, R.},
  title     = {Abschlussbericht zum Zeichnungssystem Freedraft zur rechnerunterstuetzten Zeichnungserstellung},
  address   = {Aachen},
  year      = {1977},
  language  = {de}
}
@book{Knepper1992,
  author    = {Knepper, Ludger},
  title     = {Das Rolltor : Bauwerk{\"o}ffnungs-Abschl{\"u}sse ; Aufbau, Konstruktion, Hinweise zur Berechnung / von Horst G{\"u}nter Steuff ; unter Mitarb. von Ludger Knepper ; Frieder Thiele},
  publisher = {Werner},
  address   = {D{\"u}sseldorf},
  isbn      = {3-8041-3165-4},
  pages     = {XI, 227 S. : zahlr. graph. Darst.},
  year      = {1992},
  language  = {de}
}
@book{Knepper1978,
  author    = {Knepper, Ludger},
  title     = {Einsatz undAuslegung von Hochlagersystemen fuer Container, dargestellt am Beispiel einer Seehafenumschlaganlage},
  address   = {Aachen},
  year      = {1978},
  language  = {de}
}
@book{Mautner2006,
  author    = {Mautner, Karin},
  title     = {Numerical treatment of the Black-Scholes variational inequality in computational finance},
  address   = {Berlin},
  pages     = {XII, 140 S : graph. Darst.},
  year      = {2006},
  language  = {en}
}
@book{OPUS4-4303,
  title     = {Ingenieurfreunde FH Aachen : 75 Jahre F{\"o}rderverein; Elektrotechnik und Informationstechnik, Luft- und Raumfahrttechnik, Maschinenbau und Mechatronik / [Hrsg.: Ingenieurfreunde FH Aachen e. V. ; Red.: H. J. Raatschen]},
  editor    = {Raatschen, Hans-J{\"u}rgen},
  publisher = {Klinkenberg},
  address   = {Aachen},
  isbn      = {978-3-941704-03-9},
  pages     = {112 S. : Ill., graph. Darst.},
  year      = {2010},
  language  = {de}
}
@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}
}
@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}
}
@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}
}
@book{Pfeiffer1993,
  author    = {Pfeiffer, Johann},
  title     = {Rechnergest{\"u}tzte Auslegung von Seiltrieben},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1993},
  language  = {de}
}
@book{PfeifferGauchel2004,
  author    = {Pfeiffer, Johann and Gauchel, Joachim},
  title     = {Kalibrierung Koordinatenmessger{\"a}t},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {2004},
  language  = {de}
}
@book{Pfeiffer2004,
  author    = {Pfeiffer, Johann},
  title     = {Ein Beitrag zur systematischen Beschreibung der Parameter und deren Einfluss auf die Maßgenauigkeit und Oberfl{\"a}chenqualit{\"a}t bei der Erzeugung und Herstellung von Freiformgeometrien : das System CAD/CAM/CAQ - Generieren, Herstellen, Messen},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {2004},
  language  = {de}
}
@book{Pfeiffer2003,
  author    = {Pfeiffer, Johann},
  title     = {3D-Freiformfl{\"a}chenmessung},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {2003},
  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{Pfeiffer1999,
  author    = {Pfeiffer, Johann},
  title     = {Verbesserung der Qualit{\"a}t von Freiformoberfl{\"a}chen},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1999},
  language  = {de}
}
@book{Pfeiffer1997,
  author    = {Pfeiffer, Johann},
  title     = {HSP III Koordinatenmessger{\"a}t},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1997},
  language  = {de}
}