1. Energy of the isometric transition in 109Ag
2. Standardization of Cadmium-109;Steyn,1969
3. Some Remarks on the Progress in Electron Capture Standardization;Allen,1967
4. Coincidence Method of Standardization for the Pure Electron Capture Nuclide Caesium-131;Troughton,1967
5. Table of Isotopes;Lederer,1967