@book{WickelHartogh2006,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Musik und H{\"o}rsch{\"a}den},
  edition   = {1. Aufl.},
  publisher = {Juventa-Verl.},
  address   = {Weinheim [u.a.]},
  isbn      = {3-7799-1951-6},
  pages     = {184 S. : Ill., graph. Darst.},
  year      = {2006},
  language  = {de}
}
@book{WickelHartogh2004,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Handbuch Musik in der Sozialen Arbeit},
  publisher = {Juventa},
  address   = {Weinheim},
  isbn      = {3-7799-0787-9},
  pages     = {496 S.: graph. Darst.},
  year      = {2004},
  language  = {de}
}
@book{WickelHartogh2008,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Musizieren im Alter},
  edition   = {1. Aufl.},
  publisher = {Schott},
  address   = {Mainz [u.a.]},
  isbn      = {978-3-7957-87},
  pages     = {163 S. : Ill., graph. Darst.},
  year      = {2008},
  language  = {de}
}
@article{HartoghWickel2015,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musikgeragogik. Musikalische Bildung im Alter},
  series = {Das Orchester.},
  volume    = {63},
  journal   = {Das Orchester.},
  number    = {10},
  issn      = {0030-4468},
  pages     = {18 -- 20},
  year      = {2015},
  language  = {de}
}
@book{WickelHartogh2011,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Praxishandbuch Musizieren im Alter},
  edition   = {1. Aufl.},
  publisher = {Schott Music},
  address   = {Mainz},
  isbn      = {978-3-7957-8747-9},
  year      = {2011},
  language  = {de}
}
@incollection{HartoghWickel2012,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musik in der Sozialen Arbeit - aufgezeigt am Arbeitsfeld Soziale Altenarbeit},
  series = {M.-S. Meis \& G.-A. Mies, K{\"u}nstlerisch-{\"a}sthetische Methoden in der Sozialen Arbeit},
  booktitle = {M.-S. Meis \& G.-A. Mies, K{\"u}nstlerisch-{\"a}sthetische Methoden in der Sozialen Arbeit},
  edition   = {1. Aufl.},
  publisher = {Kohlhammer},
  address   = {Stuttgart},
  isbn      = {978-3-17-021385-2},
  pages     = {203 -- 222},
  year      = {2012},
  language  = {de}
}
@incollection{WickelHartogh2008,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Musikgeragogik},
  series = {Verband deutscher Musikschulen, Musik - ein Leben lang. Grundlagen und Praxisbeispiele.},
  booktitle = {Verband deutscher Musikschulen, Musik - ein Leben lang. Grundlagen und Praxisbeispiele.},
  edition   = {1.},
  publisher = {VdM},
  address   = {Bonn},
  isbn      = {978-3-925574-71-9},
  year      = {2008},
  language  = {de}
}
@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Musik und Musikalit{\"a}t. Zu der Begrifflichkeit und den (sozial-)p{\"a}dagogischen und therapeutischen Implikationen},
  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     = {45 -- 55},
  year      = {2004},
  language  = {de}
}
@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Instrumentarium},
  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     = {113 -- 122},
  year      = {2004},
  language  = {de}
}
@incollection{HartoghWickel2004,
  author    = {Hartogh, Theo and Wickel, Hans Hermann},
  title     = {Verklanglichung},
  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     = {135 -- 142},
  year      = {2004},
  language  = {de}
}