1. B. M. Askerov, Transport Effects in Semiconductors [in Russian], Leningrad (1970).
2. I. S. Buda and L. A. Shcherbina, Fiz. Tekh. Poluprovodn.,12, 549 (1978).
3. H. Mackey and J. Sybert, Phys. Rev.,180, 678 (1969).
4. T. Fuchser, H. Mackey, and J. Subert, Phys. Rev.,2 (10), 3863 (1970).
5. H. Goldstein, Classical Mechanics, Addison-Wesley, New York (1977).