@book{Balz1994,
  author    = {Balz, Ulrich},
  title     = {Betriebliche Altersversorgung},
  volume    = {1607},
  edition   = {1. Aufl.},
  publisher = {Lang},
  address   = {Frankfurt am Main [u.a.]},
  pages     = {XXXV, 220 S.},
  year      = {1994},
  language  = {mul}
}
@book{Steinhausen1994,
  author    = {Steinhausen, Detlef},
  title     = {Simulationstechniken},
  edition   = {1. Aufl.},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {3-486-22656-8},
  pages     = {126 S. : graph. Darst.},
  year      = {1994},
  language  = {de}
}
@book{Steinhausen1994,
  author    = {Steinhausen, Detlef},
  title     = {Datenanalyse mit SAS},
  publisher = {Oldenbourg Verlag},
  year      = {1994},
  language  = {de}
}