Larmer, P. J., J. Bell, D. O'Brien, J. Dangen, and P. Kersten. “Hydrotherapy Outcome Measures for People With Arthritis: A Systematic Review”. New Zealand Journal of Physiotherapy, vol. 42, no. 2, July 2014, pp. 54–67, https://nzjp.org.nz/nzjp/article/view/80.