1. F. Biering-Sorensen and C. Thomsen, Medical, social and occupational history as risk indicators for low-back trouble in a general population., Spine 11 (1986) 720–725.
2. M. Miyamoto, Y. Shirai, Y. Nakayama, Y. Gemben and K. Kaneda, An Epidemiologic Study of Occupational Low Back Pain in Truck Drivers., J. Nippon Med. Sch. 67(3) (2000) 186–190.
3. G. Waddel, The clinical course of low back pain. In: Waddell G, editor. The back pain revolution. 1st edition, Edinburgh: Churchill Livingstone, (1998) 103–117.
4. C. Leech, The Renaissance Project. Preventing chronic disability from low back pain. Ireland: Department of Social and Family Affairs. Government Publication (2004).
5. D. McMullin, T. Stobbe, S. Bang, D. Goddard, B. Han, R. Simmers, D. Fisher, A. French, D. Toothman and G. Middleton, Asymmetric loading on the body during symmetric lifts., In: Bittner, A. C., Champney, P. C. (Eds.), Advances in Industrial Ergonomics and Safety VII. Taylor & Francis, London, (1995) 719–725.