1. Alves, J.G., Novais, L., 2006. Environmental gamma radiation monitoring at ITN. In: Proceedings of the 10th International Conference on Radiation Physics, Coimbra, Portugal.
2. Decree Law no. 138, August 2005. Create the Environmental Radioactivity Monitoring Programme. Ministry of Science, Technology and High Education.
3. Decree Law no. 243, September 2001. Approves the guidelines concerning the drinking water quality and transposes the 98/83/CE Directive in this matter. Ministry of the Environment.
4. 2000/473/EURATOM—Commission Recommendation of 8 June 2000, Official Journal of the European Commission, no. 191, 27 June 2000.
5. European Council Directive 96/29 EURATOM, 13 May 1996.