1. Barondess J, et al. Musculoskeletal disorders and the workplace: low back and upper extremities. Washington, DC: National Academy of Sciences; 2001. p. 1–512.
2. Airaksinen O, et al. Chapter 4 European guidelines for the management of chronic nonspecific low back pain. Eur Spine J. 2006;15:s192–300.
3. Steele J, et al. Lumbar kinematic variability during gait in chronic low back pain and associations with pain, disability and isolated lumbar extension strength. Clin Biomech (Bristol, Avon). 2014;29(10):1131–8.
4. Council, N.R., Institute of Medicine. 2001. Musculoskeletal Disorders and the Workplace-Low Back and Upper Extremities. National Academy of Sciences. Washington, DC: National Academy Press.(ex. 3-6).
5. Council, N.R., the Institute of Medicine: Musculoskeletal disorders and the workplace: low back and upper extremities. Panel on Musculoskeletal Disorders and the Workplace. Commission on Behavioral and Social Sciences and Education. Commission of Behavioral and Social Sciences and Education, 2001.