@book{G{\"o}ldnerKath{\"o}ferKotthaus2013,
  author    = {G{\"o}ldner, Richard and Kath{\"o}fer, Sven and Kotthaus, Jochem},
  title     = {Block X - Unter Ultras},
  editor    = {Kath{\"o}fer, Sven and Kotthaus, Jochem},
  publisher = {Beltz Juventa},
  address   = {Weinheim},
  isbn      = {978-3-7799-2878-2},
  pages     = {284},
  year      = {2013},
  language  = {de}
}
@article{Kath{\"o}ferKotthaus2013,
  author    = {Kath{\"o}fer, Sven and Kotthaus, Jochem},
  title     = {"Welche alleinerziehende Mutter kann das stemmen?"},
  series = {Sozialmagazin},
  volume    = {38 (2013)},
  number    = {03. Apr},
  issn      = {0340-8469},
  pages     = {4},
  year      = {2013},
  language  = {de}
}