@book{Engels2000,
  author    = {Engels, Elmar},
  title     = {Entwicklung und Einsatz einer prozeßgef{\"u}hrten Hubzahlsteuerung f{\"u}r Schnell{\"a}uferpressen},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-383508-8},
  pages     = {XVI, 121 S. : Ill., graph. Darst.},
  year      = {2000},
  language  = {de}
}
@book{WolfFoltzKillich2000,
  author    = {Wolf, Martin and Foltz, Christian and Killich, S.},
  title     = {K3 User Guide},
  publisher = {RWTH},
  address   = {Aachen},
  pages     = {1 -- 13},
  year      = {2000},
  language  = {en}
}