1. Ligand Field Theory and Absorption Spectra of Transition Metal Ions in Glass;Bates,1962
2. Co-ordination of Fe3+ in Glass;Kurkjian;Phys. Chem. Glasses,1968
3. Some Observations on the Absorption of Iron in Silicate and Borate Glasses;Steele;Phys. Chem. Glasses,1965
4. Hares, G. B., Private communication.
5. Electron Spin Resonance of High-Spin d5 Systems;Downing;J. Chem. Phys.,1969