1. Comparison of 201Tl solution sources in UK hospitals, 2001;Baker,2001
2. Impurities in Radionuclide Materials, UVVVR Report No. 8;Dryak,1989
3. Practical Applications of Radioactivity and Nuclear Radiations;Lowenthal,2001
4. Rapid determination of Mo-99;Richard;J. Nucl. Med.,1969
5. Schrader, H. 1997. Activity measurements with ionization chambers. Monograph BIPM-4.