1. and ESCA: Atomic, Molecular and Solid State Structure Studied by Means of Electron Spectroscopy, p. 19, Almqvist and Wiksells, Uppsala (1967).
2. ESCA of inorganic metal azides
3. and Electronic Processes in Ionic Crystals. Oxford University Press, London (1948).
4. Color Centers in Alkali Halide Crystals. II
5. International;Schulman,1963