@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Biografiearbeit},
  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     = {223 -- 228},
  year      = {2004},
  language  = {de}
}
@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musik in der Altenarbeit},
  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     = {359 -- 372},
  year      = {2004},
  language  = {de}
}
@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musik in der Behindertenarbeit},
  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     = {373 -- 385},
  year      = {2004},
  language  = {de}
}
@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}
}
@article{HartoghWickel2014,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musikgeragogik. Grundlagen, Arbeitsfelder, Aus- und Weiterbildung},
  series = {Diskussion Musikp{\"a}dagogik},
  journal   = {Diskussion Musikp{\"a}dagogik},
  number    = {62},
  issn      = {1437-4722},
  pages     = {4 -- 7},
  year      = {2014},
  language  = {de}
}
@article{HartoghWickel2015,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {High Fossility und Faltenrock. Musikgeragogik ist musikalische Bildung im Alter.},
  series = {KulturR{\"a}ume},
  volume    = {5},
  journal   = {KulturR{\"a}ume},
  number    = {8},
  issn      = {2193-6234},
  pages     = {13 -- 17},
  year      = {2015},
  language  = {de}
}
@article{HartoghWickel2017,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musik in der Sozialen Arbeit. Definitionen, theoretische Verortung und Praxisfelder},
  series = {SozialAktuell},
  volume    = {49},
  journal   = {SozialAktuell},
  number    = {2},
  issn      = {1422-8432},
  pages     = {10 -- 13},
  year      = {2017},
  language  = {de}
}
@incollection{HartoghWickel2017,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musikgeragogik - Ein neues Feld der Altenbildung},
  series = {Verband deutscher Musikschulen e. V. (Hrsg.). Grundlagen und Arbeitshilfen. Spektrum Inklusion},
  booktitle = {Verband deutscher Musikschulen e. V. (Hrsg.). Grundlagen und Arbeitshilfen. Spektrum Inklusion},
  publisher = {VdM Verlag},
  address   = {Bonn},
  isbn      = {978-3-925574-88-7},
  pages     = {280 -- 283},
  year      = {2017},
  language  = {de}
}
@incollection{WickelHartogh2018,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Musikgeragogik},
  series = {Schramek, Kricheldorff, Schmidt-Hertha, Steinfort-Diedenhofen (Hrsg.): Altern(n), Lernen, Bildung. Ein Handbuch},
  booktitle = {Schramek, Kricheldorff, Schmidt-Hertha, Steinfort-Diedenhofen (Hrsg.): Altern(n), Lernen, Bildung. Ein Handbuch},
  edition   = {1.},
  publisher = {Kohlhammer},
  address   = {Stuttgart},
  isbn      = {978-3-17-032752-8},
  pages     = {197 -- 204},
  year      = {2018},
  language  = {de}
}