1. A. Many, Y. Goldstein, and N. B. Grover, Semiconductor Surfaces ( Interscience, New York, 1965 ).
2. D. R. Frankl, Electrical Properties of Semiconductor Surfaces ( Pergamon, London, 1967 ).
3. P. Mark, Surface Sci. 25, 192 (1971).
4. P. B. Weisz, J. Chem. Phys.
21, 1531 (1953).
5. J. A. Stratton, Electromagnetic Theory ( McGraw-Hill, New York, 1971 ).