1. J. L. Vossen and W. Kern, Phys. Today
33, 26 (May 1980).
2. J. M. Poate and King-Ning Tu, Phys. Today
33, 34 (May 1980).
3. J. P. Hirth and K. L. Moazed, in Physics of Thin Films, Vol. 4, G. Hass and R. E. Thun, eds., Academic Press, New York (1967), p. 97.
4. K. H. Behrndt, in Physics of Thin Films, Vol. 3, G. Hass and R. E. Thun, eds., Academic Press, New York (1966), p. 1.
5. R. E. Thun, in Physics of Thin Films, Vol. 1, G. Hass, ed., Academic Press, New York (1963), p. 187.