@book{BlomeZaun2004,
  author    = {Blome, Hans-Joachim and Zaun, Harald},
  title     = {Der Urknall : Anfang und Zukunft des Universums},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {3406508375},
  pages     = {128 S : graph. Darst ; 18 cm},
  year      = {2004},
  language  = {de}
}
@book{BlomeZaun2007,
  author    = {Blome, Hans-Joachim and Zaun, Harald},
  title     = {Der Urknall : Anfang und Zukunft des Universums 2., aktualisierte Aufl.},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {3-406-50837-5},
  pages     = {128 S.},
  year      = {2007},
  language  = {de}
}