1. ICRP 65 Protection against Radon-222 at Home and at Work. A Report of the International Commission on Radiological Protection, ICRP Publication 65, Pergamon Press, 1993.
2. EC 1996 Council Directive 96/29/EURATOM of 13 May 1996 laying down basic safety standards for the protection of the health of workers and the general public against the dangers arising from ionizing radiation. Legislation, Official Journal of the European Communities, L159, vol. 39, 1996.