1. Site of the State Research Institute of Non-Destructive Testing: www.introscopy.tpu.ru.
2. A. A. Vorob’ev, B. A. Kononov, and V. V. Evstigneev, Electron Beams of Betatrons [in Russian], Atomizdat, Moscow (1974).
3. L. M. Anan’ev, A. A. Vorob’ev, and V. I. Gorbunov, Induction Electron Accelerator — Betatron [in Russian], Gosatomizdat, Moscow (1961).
4. S. E. Barden, Proc. Phys. Soc. London, B64, 579–590 (1951).
5. P. A. Cherdantsev, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 6, 177–178 (1959).