@book{HansbauerHensenMuelleretal.2009,
  author    = {Hansbauer, Peter and Hensen, Gregor and M{\"u}ller, Katja and von Spiegel, Hiltrud},
  title     = {Familiengruppenkonferenz. Eine Einf{\"u}hrung},
  publisher = {Juventa},
  address   = {Weinheim \& M{\"u}nchen},
  isbn      = {3-7799-1953},
  pages     = {240 S},
  year      = {2009},
  language  = {de}
}
@article{BastianHensenLenzmannetal.2009,
  author    = {Bastian, Pascal and Hensen, Gregor and Lenzmann, Virginia and Lohmann, Anne and Ziegler, Holger and B{\"o}ttcher, Wolfgang},
  title     = {Evaluationsforschung zu Wirkungen und Mechanismen Fr{\"u}her Hilfen},
  series = {Soziale Passagen},
  volume    = {1},
  journal   = {Soziale Passagen},
  number    = {2},
  pages     = {259 -- 266},
  year      = {2009},
  language  = {de}
}