@article{Wickel1999,
  author    = {Wickel, Hans Hermann},
  title     = {Ein musikalischer Zahl(en)tag},
  series = {Praxis Spiel + Gruppe},
  volume    = {12},
  journal   = {Praxis Spiel + Gruppe},
  number    = {4},
  pages     = {151 -- 155},
  year      = {1999},
  language  = {de}
}