@book{GrosseKolmVoelzkow2016,
  author    = {Grosse, Gisela and Kolm, Dominik and Voelzkow, Alena},
  title     = {Die Vorwortstudie 2016},
  publisher = {CCI},
  address   = {M{\"u}nster},
  year      = {2016},
  language  = {de}
}