1. W. R. Hoover:J. Comp. Mat., 1976, vol. 10, p. 106.
2. K. M. Prewo and K. G. Kreider:J. Comp. Mat., 1972, vol. 6, p. 338.
3. W. R. Kreuger: E. I. DuPont de Nemours and Co., Wilmington, DE, private communication, September 1979.
4. W. D. Riecke:Optik, 1962, vol. 19, p. 81.
5. L. E. Davis, N.C. MacDonald, P. W. Palmberg, G.E. Riach, and R.E. Weber:Handbook of Auger Electron Spectroscopy, 2nd ed., Physical Electronic Industries, Eden Prairie, MN, 1976, pp. 39–41.