1. See for example, H. Z. Cummins and H. L. Swinney in “Progress in Optics”, Vol. 8 (edited by E. Wolf) North-Holland, Amsterdam (1970).
2. I. A. Iakovlev, T. S. Velichkina, and L. F. Mikheeva, Dokl. Akad. Nauk. SSSR 107, 675 (1956); Usp. Fiz. Nauk 69, 411 (1957).
3. W. D. Johnston and I. P. Kaminow, Phys. Rev. 168, 150 (1968).
4. P. D. Lazay, J. H. Lunacek, N. A. Clark and G. B. Benedek in “Light Scattering Spectra of Solids” (edited by G. W. Wright) Springer-Verlag, New York (1969) p. 593.
5. E. F. Steigmeier, G. Harbeke and R. K. Wehner in “Light Scattering in Solids” (edited by M. Balkanski) Flammarion Sciences, Paris (1971) p. 396.