1. V. A. Bazylev and N. K. Zhevago, Fast Particles Emission in Matter and External Fields (Nauka, Moscow, 1987) [in Russian].
2. N. P. Kalashnikov and M. N. Strikhanov, Sov. J. Quantum Electron. 11 (11), 1405 (1981).
3. V. G. Baryshevskii, Channeling, Emission, and Reactions in Crystals under High Energy (Belarusian State Univ., Minsk, 1982) [in Russian].
4. E. A. Koptelov, Fiz. Tverd. Tela 14 (4), 1211 (1972).
5. E. A. Koptelov and N. P. Kalashnikov, Preprint No. P-0054 IYaI AN SSSR (Institute for Nuclear Research USSR Acad. Sci., Moscow, 1977).