@book{GrafmuellerRassMoeslein2015,
  author    = {Leontin Karl Grafm{\"u}ller and Matthias Ra{\"s} and Kathrin M. M{\"o}slein},
  title     = {Die Genossenschaft im Web 2.0: Social Media richtig einsetzen},
  year      = {2015},
  language  = {de}
}