1. B. V. Bunkin, A. V. Gaponov-Grekhov, A. S. El’chaninov et al., Pis’ma Zh. Tekh. Fiz. 18(9), 61 (1992) [Sov. Tech. Phys. Lett. 18, 299 (1992)].
2. S. D. Korovin, V. V. Rostov, and A. V. Smorgonskii, Izv. Vyssh. Uchebn. Zaved. Radiofiz. 29, 1278 (1986).
3. É. B. Abubakirov, V. I. Belousov, V. N. Varganov et al., Pis’ma Zh. Tekh. Fiz. 9, 533 (1983) [Sov. Tech. Phys. Lett. 9, 230 (1983)].
4. N. I. Gunina, S. D. Korovin, and V. V. Rostov, Abstracts of papers presented at the Sixth All-Union Symposium on High-Current Electronics, Tomsk, 1986, Vol. 3 [in Russian], p. 23.
5. S. D. Korovin and I. V. Pegel’, Zh. Tekh. Fiz. 62(4), 139 (1992) [Sov. Phys. Tech. Phys. 37, 434 (1992)].