Segura, A; Piazza, SJ (2007). "Mechanics of Ambulation With Standard and Spring-Loaded Crutches". Archives of Physical Medicine and Rehabilitation. 88 (9): 1159–1163. doi:10.1016/j.apmr.2007.05.026. PMID17826462.
Seeley, M K; Hunter, I; Bateman, T; Roggia, A; Larson, B J; Draper, DO (2011). "A Kinematic Comparison of Spring-Loaded and Traditional Crutches". Journal of Sport Rehabilitation. 20 (2): 198–206. doi:10.1123/jsr.20.2.198. PMID21576711.
Segura, A; Piazza, SJ (2007). "Mechanics of Ambulation With Standard and Spring-Loaded Crutches". Archives of Physical Medicine and Rehabilitation. 88 (9): 1159–1163. doi:10.1016/j.apmr.2007.05.026. PMID17826462.
Seeley, M K; Hunter, I; Bateman, T; Roggia, A; Larson, B J; Draper, DO (2011). "A Kinematic Comparison of Spring-Loaded and Traditional Crutches". Journal of Sport Rehabilitation. 20 (2): 198–206. doi:10.1123/jsr.20.2.198. PMID21576711.