@book{GoeldnerKathoeferKotthaus2013,
  author    = {Richard G{\"o}ldner and Sven Kath{\"o}fer and Jochem Kotthaus},
  title     = {Block X - Unter Ultras},
  editor    = {Sven Kath{\"o}fer and Jochem Kotthaus},
  publisher = {Beltz Juventa},
  address   = {Weinheim},
  isbn      = {978-3-7799-2878-2},
  pages     = {284},
  year      = {2013},
  language  = {de}
}