1. A. A. De Salles, IEEE Trans., 10, 812–820 (1983).
2. D. M. Kim, H. L. Kim, J. L. Lee, and Y. I. Lee, IEEE Electron. Device Lett., 21, 264–267 (2000).
3. R. A. Pucel, H. A. Haus, and H. Statz, in: Advances in Electronics and Electron Physics, Academic, New York (1975), Vol. 38, pp. 195–265.
4. I. A. Bocharova, in: Proceedings of the Eighth International Scientific and Technical Conference on Current Problems in Solid-State Electronics and Microelectronics, September 14–19, 2002, Taganrog [in Russian], TRTU (2002), Vol. 2, pp. 128–130.
5. F. J. Tegude and K. Heime, Electron. Lett., 16, 22–23 (1980).