1. M. Cardona, in: “Light Scattering in Solids II”, eds. M. Cardona and G. Güntherodt, Springer, Berlin (1982) p. 49 and references therein.
2. G. Abstreiter, A. Pinczuk, and M. Cardona, in: “Light Scattering in Solids IV”, eds. M. Cardona and G. Güntherodt, Springer, Berlin (1984) p. 5 and references therein.
3. A. Pinczuk and G. Abstreiter, in: “Light Scattering in Solids V”, eds. M. Cardona and G. Güntherodt, Springer, Berlin (1989) p. 153 and references therein.
4. G.B. Wright and A. Mooradian, in: “Proceedings of the 9th Int. Conf. on the Physics of Semiconductors”, Nauka, Leningrad (1969) p. 1067; A. Mooradian, in: “Laser Handbook”, Vol. 2, eds. F.T. Arecchi and E.O. Schulz-Dubois, North Holland, Amsterdam (1972) p. 1409.
5. M.V. Klein, in: “Light Scattering in Solids I”, ed. M. Cardona, Springer, Berlin (1975) p. 148.