Pauley, Tim, et al. “A Single-Blind, Cross-over Trial of Hip Abductor Strength Training to Improve Timed Up & Go Performance in Patients With Unilateral, Transfemoral Amputation”. Journal of Rehabilitation Medicine, vol. 46, no. 3, Dec. 2013, pp. 264-70, doi:10.2340/16501977-1270.