@book{BenknerStepping2002,
  author    = {Benkner, Thorsten and Stepping, Christoph},
  title     = {UMTS - Universal Mobile Telecommunications System},
  publisher = {Schlembach},
  address   = {Weil der Stadt},
  isbn      = {3-935340-07-9},
  pages     = {XVI, 511 S. : graph. Darst.},
  year      = {2002},
  language  = {en}
}
@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{Gebhardt2003,
  author    = {Gebhardt, Andreas},
  title     = {Rapid Prototyping},
  publisher = {Hanser},
  address   = {Munich [u.a.]},
  isbn      = {3-446-21259-0},
  pages     = {XV, 379 S. : Ill., graph. Darst.},
  year      = {2003},
  language  = {en}
}
@book{Siepmann1997,
  author    = {Siepmann, Thomas},
  title     = {Modeller for Value Systems},
  publisher = {Erasmus Universiteit Rotterdam},
  address   = {Rotterdam},
  year      = {1997},
  language  = {en}
}
@book{BenknerDavid2005,
  author    = {Benkner, Thorsten and David, Klaus},
  title     = {Digital Mobile Radio Systems (Nicht erschienen?)},
  publisher = {Wiley},
  isbn      = {0-471-97591-5},
  pages     = {500},
  year      = {2005},
  language  = {en}
}
@book{SammFaissnerHenrigsetal.1982,
  author    = {Samm, Doris and Faissner, H. and Henrigs, W. and Preussger, A.},
  title     = {Further evidence for the radiative decay of a light, penetrating particle / Faissner, H. ; Heinrigs, W. ; Preussger, A. ; Samm, D.},
  publisher = {Technische Hochschule},
  address   = {Aachen},
  pages     = {16},
  year      = {1982},
  language  = {en}
}
@book{Schuermann1983,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Song of joy : Kippenberger, Sch{\"u}rmann [Martin Kippenberger - gemalte Bilder ; Wilhelm Sch{\"u}rmann - fotografierte Bilder]},
  publisher = {Neue Galerie},
  address   = {Aachen},
  pages     = {20 S. : {\"u}berw. Ill.},
  year      = {1983},
  language  = {en}
}
@book{JacobsJarke1994,
  author    = {Jacobs, Stephan and Jarke, Matthias},
  title     = {Requirements information management : the NATURE approach / RWTH Aachen, Fachgruppe Informatik. M. Jarke},
  publisher = {RWTH, Fachgruppe Informatik},
  address   = {Aachen},
  pages     = {27 S : graph. Darst.},
  year      = {1994},
  language  = {en}
}
@book{JanzLoeoefPeters2003,
  author    = {Janz, Norbert and L{\"o}{\"o}f, Hans and Peters, Bettina},
  title     = {Firm Level Innovation and Productivity, Is there a Common Story Across Countries?},
  publisher = {Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsforschung ZEW},
  address   = {Mannheim},
  isbn      = {ISSN 1727-7051},
  pages     = {34},
  year      = {2003},
  language  = {en}
}
@book{JanzEblingGottschalketal.2002,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Gottschalk, Sandra and Peters, Bettina},
  title     = {Innovation Activities in the German Economy: Report on indicators from the Innovation Survey 2001 (english translation) / Janz, N., G. Ebling, S. Gottschalk, B. Peters und T. Schmidt},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsforschung},
  address   = {Mannheim},
  year      = {2002},
  language  = {en}
}