1. H. R. Griem, Spectral Line Broadening by Plasmas (Academic, New York, 1974; Mir, Moscow, 1978).
2. M. Yu. Romanovsky and W. Ebeling, J. Phys. A 252, 488 (1998).
3. M. Yu. Romanovsky and W. Ebeling, Laser Phys. 14, 850 (2004).
4. M. Yu. Romanovsky and W. Ebeling, Contrib. Plasma Phys. 46, 195 (2006).
5. W. B. Thompson, Proc. Phys. Soc. London B 70, 1 (1957).