@book{Wahle1999,
  author    = {Wahle, Michael},
  title     = {Angewandte Strukturanalyse. - (Dynamik)},
  publisher = {Mainz},
  address   = {Aachen},
  isbn      = {3-89653-567-6},
  pages     = {120, A41 S. : Ill., graph. Darst.},
  year      = {1999},
  language  = {de}
}
@book{Chwallek1999,
  author    = {Chwallek, Constanze},
  title     = {Bewertungsrelevanz ver{\"o}ffentlichter Kapitalflußrechnungen b{\"o}rsennotierter deutscher Unternehmen},
  publisher = {Lang},
  address   = {Frankfurt am Main},
  isbn      = {3-631-34214-4},
  pages     = {XIX, 219 S.},
  year      = {1999},
  language  = {de}
}