1. C. T. Hess, J. Michel, T. R. Horton, H. M. Prichard, W. A. Coniglio, Health Phys., 48 (1985) 553.
2. P. T. King, J. Michael, W. S. Moore, Geochim. Cosmochim. Acta, 46 (1982) 1173.
3. ICRP 68, Annales of the ICRP 24(4) (1994) 66.
4. WHO, Health Criteria and Other Supporting Information, Addendum to Vol. 2 in: Guidelines for Drinking-water Quality, 2nd ed., World Health Organisation, Geneva, 1998.
5. US EPA, Proposed Drinking Water Standards, US EPA 65 FR 76707, US Environmental Protection Agency, December 7, 2000.