@article{BaakenvonHagen1997,
  author    = {Baaken, Thomas and von Hagen, Friederike},
  title     = {Der Innovationsprozeß im Mittelstand},
  series = {Inno - Zeitschrift f{\"u}r Innovationen in NRW},
  journal   = {Inno - Zeitschrift f{\"u}r Innovationen in NRW},
  pages     = {4 -- 6},
  year      = {1997},
  language  = {de}
}
@incollection{BaakenvonHagen1986,
  author    = {Baaken, Thomas and von Hagen, Friederike},
  title     = {Marktforschung f{\"u}r technische Produkte},
  series = {Planung und Analyse},
  booktitle = {Planung und Analyse},
  pages     = {S. 251 -- 255.},
  year      = {1986},
  language  = {de}
}