Ottenvall Hammar, Isabelle, Christina Ekelund, Katarina Wilhelmson, and Kajsa Eklund. “Impact on Participation and Autonomy: Test of Validity and Reliability for Older Persons”. Health Psychology Research 2, no. 3 (October 22, 2014). Accessed September 19, 2020. https://www.pagepressjournals.org/index.php/hpr/article/view/hpr.2014.1825.