1. B. Wolf, Handbook of Ion Sources (CRC Press, New York, 1995).
2. A. S. Metel’, First All-Union Conference on Plasma Emission Electronics [in Russian] Ulan-Ude (1991), pp. 77–81.
3. B. I. Moskalev, Hollow-Cathode Discharges [in Russian] (Énergiya, Moscow, 1969).
4. I. G. Brown The Physics and Technology of Ion Sources (Wiley and Sons, New York, 1989).
5. M. A. Zav’yalov, Yu. E. Kreindel, A. A. Novikov et al., Plasma Processes in Technological Electron Beams [in Russian] (Énergoatomizdat, Moscow, 1989).