@book{BoeckerZiemenButt2004,
  author    = {Jens B{\"o}cker and Werner Ziemen and Katja Butt},
  title     = {Marktsegmentierung in der Praxis},
  series = {Edition Praxis. Wissen},
  publisher = {BusinessVillage},
  address   = {G{\"o}ttingen},
  isbn      = {3-934424-56-2},
  year      = {2004},
  language  = {de}
}