1. R. S. Allgaier, J. Vac. Sci. Technol., 8: 113–124 (1971)
2. K. W. Boer, Phys. Stat. Sol., 4A: 571–596 (1971)
3. G. A. Yurlova, I. D. Gudkov, and B. T. Kolomiets, Soviet Phys.–Semicond., 4 (9): 1401–1404 (1971)
4. N. Klein, Thin Solid Films, 7: 149–177 (1971)
5. Rudol’f L. Myuller, Consultants Bureau, New Yrrk (1971), 240 pp.