@book{Peppers.2000,
  address = {London},
  author = {Peppers, Don and Rogers, Martha},
  edition = {Repr.},
  interhash = {11bfd8ca0c68a3749e753dd08214e1ca},
  intrahash = {5677ebfc7bffbb0f208c3c5981c55f00},
  isbn = {0749917121},
  publisher = {Piatkus},
  title = {Enterprise one-to-one:  Tools for building unbreakable customer relationships in the interactive age},
  year = 2000
}

@book{Mertens.1992,
  address = {Bergisch Gladbach},
  author = {Mertens, Michael},
  interhash = {9e8c68590612e355f5b05fc43d88a541},
  intrahash = {cb52418d5b4d1f4227aa409b19101567},
  isbn = {3890122981},
  publisher = {J. Eul},
  series = {Reihe Versicherungswirtschaft},
  title = {Kundentypologien im Versicherungsgeschäft mit Privatkunden},
  volume = {Bd. 10},
  year = 1992
}