1. Bueren, H. G. van: Imperfections in Crystals. Amsterdam: North-Holland Publ. Comp. 1961
2. Dekker, A. J.: Solid-State Physics. London: Macmillan 1952
3. Eyring, H., Henderson, D., Jost, W. (ed.): Physical Chemistry, An Advanced Treatise, Vol. X, New York: Academic Press 1970
4. Gool, W. van: Principles of Defect Chemistry of Crystalline Solids. New York, London: Academic Press 1966
5. Gray, T. J.: The Defect Solid State, New York: Interscience Publ. Inc. 1957