@book{WagschalDoeringVatteretal.2005,
  author    = {Wagschal, Uwe and D{\"o}ring, Herbert and Vatter, Adrian and Freitag, Markus and Obinger, Herbert},
  title     = {Policy-Forschung und vergleichende Regierungslehre},
  publisher = {Lit},
  address   = {M{\"u}nster},
  year      = {2005},
  language  = {de}
}