1. Injuries in Rugby Union Football;Davies, J.E.; Gibson, T.;British Medical Journal,1978
2. Cervical spine injuries in Rugby Union football;Williams, J.P.R.; McKibbin, B.;British Medical Journal,1978
3. A Study of the Mechanics of Spinal Injury;Roaf, R., 1960;J. Bone Jt. Surgery
4. Low Back Injury in Sport;Billings, R.A.; Burry, H.C.; Jones, R.;Rheumatol.& Rehabil,1977
5. Working Group on Low Back Pain;Anderson, J.A.D.;Fac. Comm. Med. RCP Newletter,1978