@book{Pooten2006,
  author    = {Pooten, Holger},
  title     = {Kennzahlen und Kennzahlensysteme II},
  volume    = {5},
  edition   = {1. Aufl.},
  publisher = {Euroforum-Verl.},
  address   = {D{\"u}sseldorf},
  pages     = {81 S. : Ill., graph. Darst.},
  year      = {2006},
  language  = {de}
}
@book{Pooten2006,
  author    = {Pooten, Holger},
  title     = {Entstehung des Jahresabschlusses und bilanzpolitische M{\"o}glichkeiten nach HGB},
  volume    = {2},
  edition   = {1. Aufl.},
  publisher = {Euroforum-Verl.},
  address   = {D{\"u}sseldorf},
  pages     = {113 S. : Ill.},
  year      = {2006},
  language  = {de}
}