@book{ChwallekFelden2006,
  author    = {Chwallek, Constanze and Felden, Birgit},
  title     = {RatingCheck : Wertsch{\"o}pfungskette / Chwallek, Constanze ; Felden, Birgit},
  publisher = {Deutscher Sparkassen Verlag},
  address   = {Stuttgart},
  year      = {2006},
  language  = {en}
}