@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musik im Strafvollzug},
  series = {Th. Hartogh \& H. H. Wickel, Handbuch: Musik in der Sozialen Arbeit},
  booktitle = {Th. Hartogh \& H. H. Wickel, Handbuch: Musik in der Sozialen Arbeit},
  edition   = {1.},
  publisher = {Juventa},
  address   = {Weinheim},
  isbn      = {3-7799-0787-9},
  pages     = {435 -- 440},
  year      = {2004},
  language  = {de}
}
@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Zur musikalischen Professionalit{\"a}t in der Sozialen Arbeit},
  series = {Th. Hartogh \& H. H. Wickel, Handbuch: Musik in der Sozialen Arbeit},
  booktitle = {Th. Hartogh \& H. H. Wickel, Handbuch: Musik in der Sozialen Arbeit},
  edition   = {1.},
  publisher = {Juventa},
  address   = {Weinheim},
  isbn      = {3-7799-0787-9},
  pages     = {443 -- 451},
  year      = {2004},
  language  = {de}
}
@incollection{Wickel2004,
  author    = {Wickel, Hans Hermann},
  title     = {Musik als emotionsausl{\"o}sendes Medium},
  series = {Stefanie Ernst , Auf der Klaviatur der Wirklichkeit. Fs. Benno Biermann},
  booktitle = {Stefanie Ernst , Auf der Klaviatur der Wirklichkeit. Fs. Benno Biermann},
  edition   = {1.},
  publisher = {Waxmann},
  address   = {M{\"u}nster},
  isbn      = {3-8309-1290-0},
  pages     = {94 -- 109},
  year      = {2004},
  language  = {de}
}