1. ACSM's guidelines for exercise testing and prescription;American College of Sports Medicine (ACSM),2000
2. Clinical guidelines versus clinical practice in the management of low back pain;Armstrong;International Journal of Clinical Practice,2003
3. Management of low back pain in primary care;Bartley,2001
4. A prospective, randomised 5-year follow-up study of functional restoration in chronic low back pain patients;Bendix;European Spine Journal,1998