@article{SiersSoegtropBorrmannetal.2011,
  author    = {Siers, Carsten and S{\"o}gtrop, Christian and Borrmann, Arne and Hoepner, Gert},
  title     = {Vernetzung von Kultur und Struktur},
  series = {Sales-Business : der Navigator f{\"u}r Vertrieb, Verkauf und Strategie},
  volume    = {20},
  journal   = {Sales-Business : der Navigator f{\"u}r Vertrieb, Verkauf und Strategie},
  number    = {5},
  publisher = {Springer Gabler},
  address   = {Wiesbaden},
  issn      = {1616-7902},
  doi       = {10.1365/s35141-011-0093-5},
  pages     = {32 -- 34},
  year      = {2011},
  language  = {de}
}
@article{SiersHoepner2015,
  author    = {Siers, Carsten and Hoepner, Gert},
  title     = {Vertriebskompass 2016 - die Herausforderungen},
  series = {Vertriebsmanager : Magazin f{\"u}r modernes Vertriebsmanagement},
  volume    = {2015},
  journal   = {Vertriebsmanager : Magazin f{\"u}r modernes Vertriebsmanagement},
  publisher = {Quadriga Media Berlin GmbH},
  address   = {Berlin},
  issn      = {1610-5060 ; 2199-1588},
  year      = {2015},
  language  = {de}
}
@techreport{HoepnerSiers2014,
  author    = {Hoepner, Gert and Siers, Carsten},
  title     = {6. Studie Vertriebskompass / durchgef{\"u}hrt von der FH Aachen und der Siers \& Collegen GmbH},
  publisher = {FH Aachen},
  address   = {Aachen},
  organization    = {FH Aachen},
  pages     = {35 Bl.},
  year      = {2014},
  language  = {de}
}
@techreport{HoepnerSiers2015,
  author    = {Hoepner, Gert and Siers, Carsten},
  title     = {7. Studie Vertriebskompass 2015/2016 / durchgef{\"u}hrt von der FH Aachen und der Siers \& Collegen GmbH},
  publisher = {FH Aachen},
  address   = {Aachen},
  pages     = {42 Bl.},
  year      = {2015},
  language  = {de}
}
@book{HoepnerJanzSiersetal.2008,
  author    = {Hoepner, Gert and Janz, Norbert and Siers, Carsten and Honert, Matthias},
  title     = {Zukunftsstudie Vertriebsnavigator / durchgef{\"u}hrt von der Fachhochschule Aachen und Axantos sales consultancy GmbH},
  publisher = {Axantos sales consultancy GmbH},
  address   = {D{\"u}sseldorf},
  pages     = {25 Bl. : graph. Darst.},
  year      = {2008},
  language  = {de}
}
@book{HoepnerJanzSiersetal.2008,
  author    = {Hoepner, Gert and Janz, Norbert and Siers, Carsten and Honert, Matthias},
  title     = {Zukunfts- und Benchmarkstudie Vertriebsnavigator / durchgef{\"u}hrt von der Fachhochschule Aachen und Axantos sales consultancy GmbH},
  publisher = {Axantos sales consultancy GmbH},
  address   = {D{\"u}sseldorf},
  pages     = {28 Bl. : graph. Darst.},
  year      = {2008},
  language  = {de}
}