Schmid, Wolfgang. „Being Together – Exploring the Modulation of Affect in Improvisational Music Therapy With a Man in a Persistent Vegetative State – a Qualitative Single Case Study”. Health Psychology Report, t. 5, nr 2, czerwiec 2017, s. 186-92, https://czasopisma.bg.ug.edu.pl/index.php/HPR/article/view/9167.