1. United Nation Scientific Committee on Effect of Atomic Radiation. Sources and effects of ionising radiation. Report to the General Assembly with Scientific Annex. (NY: United Nations) (2000).
2. International Commission on Radiological Protection. 1990 Recommendations. ICRP Publication 60. Ann. ICRP 21(1–3) (Oxford: Pergamon Press) (1991).
3. Hart, D., Hillier, M. C. and Wall, B. F. Doses to patients from medical X-ray examinations in the UK—2000 review. (Chilton, Didcot, UK: NRPB) (2002).
4. Schandorf, C. and Tetteh, G. K. Analysis of dose and dose distribution for patients undergoing selected X-ray diagnostic procedures in Ghana. Radiat. Prot. Dosim.76, 249–255 (1998).
5. Saxeboel, G., Orlerud, H. M. and Lundgren, L. E. Radiation hygiene analysis of radiological activities in Norway. In: Brust, T., Lang, Mark, F. and Reitan, J., Ed., Radiation and Cancer Risk. Hemisphere Publishing Cooperation, New York, pp. 139–147 (1990).