1. Commission Recommendation (90/143/Euratom) of 21 February 1990 on the protection of the public against indoor exposure to radon. Official J Eur Commun, 1990; Series L, No. 80.
2. Council Directive 1988, 89/106/EEC of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States related to construction products. Official J Eur Commun, 1989; Series L, No. 40.
3. Council Directive 96/29/Euratom of 13 May 1996 laying down the basic safety standards of the health of workers and the general public against the danger arising from ionising radiation. Official J Eur Commun, 1996; Series L, No. 159.