@book{Jacobs1997,
  author    = {Jacobs, Stephan},
  title     = {Konfliktvisualisierung im kooperativen Entwurf / Stephan Jacobs. Mit Geleitw. von Helmut Krcmar und Matthias Jarke},
  publisher = {Dt. Univ.-Verl.},
  address   = {Wiesbaden},
  isbn      = {3-8244-6380-6},
  pages     = {XIX, 190 S. : Ill., graph. Darst.},
  year      = {1997},
  language  = {de}
}
@book{Call1997,
  author    = {Call, Guido},
  title     = {Entstehung und Markteinf{\"u}hrung von Produktneuheiten},
  publisher = {Gabler},
  address   = {Wiesbaden},
  isbn      = {3409136975},
  pages     = {XX, 290 S.: graph. Darst.},
  year      = {1997},
  language  = {de}
}
@book{CasseSchlueter1997,
  author    = {Casse-Schl{\"u}ter, Doris},
  title     = {Fachhochschule Aachen Fachbereich Design / Projektbetreuung Doris Casse-Schl{\"u}ter. Design: Martina Berg ...},
  address   = {Aachen},
  year      = {1997},
  language  = {de}
}