@article{HartoghWickel2015,
  author    = {Theo Hartogh and Hans Hermann Wickel},
  title     = {Musikgeragogik. Musikalische Bildung im Alter},
  journal   = {Das Orchester.},
  volume    = {63},
  number    = {10},
  pages     = {18 -- 20},
  year      = {2015},
}