Prio, A. Z., S. R. Misbah, and F. Wijayati. “The Effect of Active Foot Exercise With Open Kinetic Chain Exercise Technique on Decreasing Pain Intensity in the Elderly With Osteoarthritis and Rheumatoid Joint Pain”. Health Information : Jurnal Penelitian, vol. 9, no. 1, June 2017, pp. 15-25, doi:10.36990/hijp.v9i1.76.