@article{ViethEschweiler2004,
  author    = {Vieth, Matthias and Eschweiler, M.},
  title     = {Preisdeterminanten bei Spielertransfers in der Fussball-Bundesliga - eine empirische Analyse},
  series = {Die Betriebswirtschaft},
  volume    = {64},
  journal   = {Die Betriebswirtschaft},
  number    = {6},
  issn      = {0342-7064},
  pages     = {671 -- 692},
  year      = {2004},
  language  = {de}
}
@article{Ferrein2004,
  author    = {Ferrein, Alexander},
  title     = {Planwirtschaft},
  series = {Linux Magazin (2004)},
  journal   = {Linux Magazin (2004)},
  isbn      = {1432-640X},
  pages     = {50 -- 53},
  year      = {2004},
  language  = {de}
}