1. J. H. Schulman andW. D. Compton, “Color Centers in Solids” (Pergamon Press, New York, 1963).
2. D. Curie, “Luminescence in Crystals” (Methuen, London, 1963) p. 160.
3. S. Amelinckx, B. Batz andR. Strumane (eds), “Solid State Dosimetry” (Gordon and Breach, New York, 1969).
4. W. B. Fowler, (ed), “Physics of Color Centers” (Academic Press, New York, 1968) p. 537.
5. C. Kittel, “Introduction to Solid State Physics” (Wiley Eastern, New Delhi, 1979).