@incollection{FratzscherStephan2006,
  author    = {Wolfgang Fratzscher and Karl Stephan},
  title     = {Vorwort},
  isbn      = {3-05-501706-4},
  url       = {http://edoc.bbaw.de/oa/series/reEvdZuUlS59U/PDF/25eiXa40o8mg.pdf},
  year      = {2006},
}