1. Epidemiology and impact of low back pain;Kelsey, J.L.; White, A.A.;Spine,1980
2. Back pain and sciatica;Frymoyer, J.W.,1988
3. Scientific approach to the assessment and management of activity-related spinal disorders;Spitzer, W.O.;Spine,1987
4. Physical therapy on low back pain and sciatica;Lidstrom, A.; Zachrisson, M.;Scand7 Rehabil Med,1970
5. Lumbar disc disease: comparative analysis of physical therapy treatments;Zylbergold, R.S.; Piper, M.C.;Arch Phys Med Rehabil,1981