1. R. Becker, Modeling of Extraction of Positive Ions from Plasma IGUN (1997–2011). www.egun-igun.com
2. D. M. Goebel, J. E. Polk, I. Sandler, I. G. Mikellides, J. R. Brophy, W. G. Tighe, and K.-R. Chien, in Proceedings of the 31st International Electric Propulsion Conference (Univ. Michigan, Michigan, USA, 2009), p. IEPC–2009–152.
3. V. G. Grigor’yan, V. A. Obukhov, and A. A. Panasenkov, in Plasma Accelerators and Ion Injectors, Ed. by N. P. Kozlov and A. Morozov (Nauka, Moscow, 1984), p. 163 [in Russian].
4. V. A. Obukhov and V. E. Sosnovskii, in Proceedings of the 5th Conference on Plasma Accelerators and Ion Injectors (Nauka, Moscow, 1982), p. 105.
5. J. B. Hasted, Physics of Atomic Collisions (Butterworths, London, 1964).