1. Beatslé LH (1991) Study of the radionuclides contained in wastes produced by the phosphate industry and their impact on the environment: Report EUR 13262 EN, Luxembourg: Publication Office of the European Communities.
2. Cancio Det al. (1993) Radiological considerations related with the restoration of a phosphogypsum disposal site in Spain. Proc. Int. Symp. on Remediation and Restoration of radioactive contaminated sites in Europe. XI-5027/94, Luxembourg: Publication Office of the European Communities.
3. Councel Directive 80/836/Euratom dated 15 July 1980 pertaining to modification of the regulations for the establishment of basic standards for health protection of the population and workers against the hazards related to ionizing radiation (PB no. L 246 dated 17-9-1980).
4. Councel Directive 84/467/Euratom dated 3 September 1984 pertaining to modification of the regulations for the establishment of basic standards for health protection of the population and workers against the hazards related to ionizing radiation (PB no. L 265 dated 05-10-1984).
5. ICRP (1977) Publication no.26, Recommendations of the Int. Comm. on Radiation Protection, Oxford, UK: Pergamon Press.