1. Z. G. Pinsker, Dynamical Scattering of X-rays in Perfect Crystals [in Russian], Moscow, Nauka (1974).
2. M. L. Ter-Mikaelyan, Effect of Medium on Electromagnetic Processes at High Energies [in Russian], Erevan, Akad. Nauk. Arm. SSR (1969).
3. G. M. Garibjan and Jan Shi, Zh. Eksp. Teor. Fiz, 61, 930 (1971).
4. V. G. Baryshevsky, I.D. Feranchuk, et al., Zh. Eksp. Teor. Fiz, 61, 944 (1971).
5. H. Nitta, Phys. Lett. A, 158, 270–274 (1991).