1. D. F. Kyser, in: Electron Beam Interactions with Solids (D. F. Kyser, H. Niedrig, D. E. Newbury, and R. Shimizu, eds.), SEM, Inc., Chicago, pp. 119–35 (1982).
2. R. D. Birkhoff, in: Handbuch der Physik, vol. 34 (S. Flügge, ed.), Springer, Berlin, pp. 53–138 (1958).
3. K. Kanaya and S. Okayama, J. Phys. D
5, 43 (1972).
4. V. E. Cosslett and R. N. Thomas, Brit. J. Appl. Phys.
15, 1283 (1964).
5. R. M. Sternheimer, Phys. Rev.
145, 245 (1966).