1. in: American Institute of Physics Handbook, Ed. McGraw-Hill Publ. Comp. 1963 (p. 9 to 63).
2. Landolt-Börnstein, 6th edition, Vol. II/6, Springer-Verlag 1959 (p. 223).
3. The Chemistry of Imperfect Crystals, North-Holland Publ. Comp Amsterdam 1964.
4. Point defects in ternary ionic crystals
5. in: Hdb. Phys., Ed. Vol. XX, Springer-Verlag 1957 (p. 337).