@book{Pfeiffer1997,
  author    = {Pfeiffer, Johann},
  title     = {Design und Herstellen von Werkzeugen mit Freiformfl{\"a}chen},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1997},
  language  = {de}
}
@article{PfeifferGauchel1997,
  author    = {Pfeiffer, Johann and Gauchel, Joachim},
  title     = {Entwicklung und Simulation von Mechanismen zu Automatisierungszwecken / Joachim Gauchel ; Johann Pfeiffer},
  series = {CAE Techniques : [proceedings of the 3st International Scientific Colloquium, Rzesz{\´o}w University of Technology, Poland, September 24-27, 1997] / ed. by Kazimierz E. Oczoś},
  journal   = {CAE Techniques : [proceedings of the 3st International Scientific Colloquium, Rzesz{\´o}w University of Technology, Poland, September 24-27, 1997] / ed. by Kazimierz E. Oczoś},
  publisher = {Politechnika Rzeszowska},
  address   = {Rzesz{\´o}w},
  isbn      = {83-7199-004-9},
  pages     = {425 ff},
  year      = {1997},
  language  = {de}
}
@book{Pfeiffer1997,
  author    = {Pfeiffer, Johann},
  title     = {HSP III Koordinatenmessger{\"a}t},
  publisher = {Fachhochsch.},
  address   = {Aachen},
  year      = {1997},
  language  = {de}
}