1. C. Moore. Atomic energy levels. As derived from the analyses of optical spectra. — Washington, U.S.G., 1958. – 309 p.
2. V. Golant, A. Gilinskiy, S. Sakharov. Basics of plasma physics. – M.: Atomizdat, 1977.
3. M. Mitchner, C. Kruger. The partially ionized gases — M.: Mir, 1976 — 496p.
4. Y. Raiser. Physics of gas discharge. — M.: Science, 1987 – 592 p.
5. H. Griem. Phys. Rev., V. 131, p. 1170, 1963.