1. V. G. Bagrov, G. S. Bisnovatiy-Kogan, and V. A. Bordovitsyn, Theory of Radiation of Relativistic Particles [in Russian], Fizmatlit, Moscow (2002).
2. V. G. Bagrov, I. M. Ternov, and B. V. Kholomai, Radiation of Relativistic Electrons in the Longitudinal Periodic Electric Field of a Crystal [in Russian], Tomsk Research Center of the Siberian Branch of the USSR Academy of Sciences, Tomsk (1987).
3. G. Margaritondo, Synchrotron Radiation: Basics, Methods and Applications, Springer, Berlin (2015), p. 29.
4. V. L. Ginzburg, Izv. Akad. Nauk SSSR., Fiz., 11, 1651 (1947).
5. H. Motz, W. Thon, and R. N. J. Whitehurst, Appl. Phys., 24, 826 (1953).