Bigos, S., Bowyer, O., Braen, G., et al. Acute Low Back Problems in Adults. Clinical Practice Guideline No. 14. AHCPR Publication No 95-0642. Rockville, MD: Agency for Health Care Policy and Research, Public Health Service, U.S. Department of Health and Human Services. December, 1994.
The Effectiveness and Cost-Effectiveness of Chiropractic Management of Low-Back Pain, Pran Manga, Ph.D., Douglas Angus, M.A., Costa Papadopoulos, M. H.A., William Swan, B. A. Funded by the Ontario Ministry of Health, August, 1993, Page 104.
Leonard G. Schifrin, Chancellor Professor of Economics and Preventive Medicine, The College of William and Mary, Williamsburg, Virginia.
Low Back Pain of Mechanical Origin: Randomized Comparison of Chiropractic and Hospital Outpatient Treatment , T.W. Meade, Sandra Dyer, Wendy Browne, Joy Townsend, A.O. Frank, British Medical Journal, Volume 300, 2 June 1990, Pages 1431-1437.