1. B. T. WILKINS, S. P. STEWART, Int. J-Appl. Radiat. Isotopes, 33 (1982) 1385.
2. B. T. WILKINS, S. P. STEWART, in Proc. 4th Symp. on Determination of Radionuclides in Environmental and Biological Materials. Teddington, UK, 1983.
3. S. C. FOTI, Health Phys., 33 (1979) 387.
4. J. M. GODOY, H. SCHÜTTELKOPF, M. PIMPL, Kerforschungszentrum Karlsruhe, KfK 3530, 1983.
5. S. GERRELL, MAFF Directorate of Fisheries Research Lowestoft, personal communication.