1. V. L. Ginzburg and I. M. Frank, Zh. Eksp. Teor. Fiz. 16, 15 (1946).
2. V. L. Ginzburg and V. N. Tsytovich, Transition Radiation and Transition Scattering (Nauka, Moscow, 1984; Adam Hilger, Bristol, 1990).
3. M. I. Ryazanov and I. S. Tilinin, Sov. Phys. JETP 44(6), 1092 (1976).
4. B. M. Bolotovskii and A. V. Serov, JETP Lett. 86(1), 6 (2007).
5. M. I. Ryazanov and A. N. Safronov, Laser Phys. 6, 708 (1996).