@incollection{HartoghKehrerWickel2014,
  author    = {Hartogh, Theo and Kehrer, Eva and Wickel, Hans Hermann},
  title     = {Music Geragogics - Making Music with the Elderly},
  series = {Damien Sagrillo \& Dieter Ferring (Hrsg.): Music (Education) from the Cradle to the Grave},
  booktitle = {Damien Sagrillo \& Dieter Ferring (Hrsg.): Music (Education) from the Cradle to the Grave},
  publisher = {Margraf Publishers},
  address   = {Weikersheim},
  isbn      = {978-3-8236-1687-0},
  pages     = {69 -- 84},
  year      = {2014},
  language  = {en}
}
@incollection{Wickel2007,
  author    = {Wickel, Hans Hermann},
  title     = {Music in Social Work - as illustrated by Music Making with the Elderly (Music Geragogics)/Musik in der Sozialen Arbeit - aufgezeigt am Musizieren mit alten Menschen (Musikgeragogik)},
  series = {B. Haselbach, M. Gr{\"u}ner, Sh. Salmon, Im Dialog. Elementare Musik- und Tanzp{\"a}dagogik im Interdisziplin{\"a}ren Kontext/In Dialogue. Elemental Music and Dance Education in Interdisciplinary Contexts},
  booktitle = {B. Haselbach, M. Gr{\"u}ner, Sh. Salmon, Im Dialog. Elementare Musik- und Tanzp{\"a}dagogik im Interdisziplin{\"a}ren Kontext/In Dialogue. Elemental Music and Dance Education in Interdisciplinary Contexts},
  edition   = {1. Aufl.},
  publisher = {Schott Music},
  address   = {Mainz},
  isbn      = {978-3-7957-0596-1},
  pages     = {146 -- 165},
  year      = {2007},
  language  = {en}
}