Gerrit Onne van de Klashorst
The disposition of the musician
A Handbook for Musicians and Coming Musicians of all Instruments about the Motor Aspects of Professional Disposition in Performing and Teaching, with all Exercises to stay or to become disposed
DAS Standardwerk von Gerrit Onne van Klashorst über die Dispokinesis.
Broekmans & van Poppel B.V.,Amsterdam 2002
https://www.stretta-music.de/van-de-klashorst-the-disposition-of-the-musician-nr-154650.html