@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}
}
@article{WickelHartogh2005,
  author    = {Wickel, Hans Hermann and Hartogh, Theo},
  title     = {Ausbildungsdisziplin Musikgeragogik},
  series = {Musikforum},
  volume    = {3},
  journal   = {Musikforum},
  number    = {3},
  pages     = {16 -- 18},
  year      = {2005},
  language  = {mul}
}
@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}
}