1. Value ofx ray examinations of the cervical spine;Heller, C.A.; Stanley, P.; Lewis-Jones, B.; Heller, R.F.;BrMedJ,1983
2. Cervical spondylosis-routine oblique films are unnecessary;Macpherson, P.; Macpherson, E.L.S.;Health Bull Edinb,1981
3. How dangerous are diagnostic x-rays?;Russell, J.G.B.;Clin Rad,1984
4. National Radiological Protection Board. Living with radiation:the system of radiological protection,1987