@book{Jansen2008,
  author    = {Jansen, Thomas},
  title     = {Auswertung von Kennzahlen und Risikomanagement},
  edition   = {2.},
  year      = {2008},
  language  = {de}
}
@book{Jansen2008,
  author    = {Jansen, Thomas},
  title     = {Auswertung von Kennzahlen und Risikomanagement},
  year      = {2008},
  language  = {de}
}