1. I.I. Sobelman, L.A. Vainstein, E.A. Yukov: Excitation of Atoms and Broadening of Spectral Lines, 2nd edn., Springer Ser. Atoms Plasmas, Vol. 15 (Springer, Berlin, Heidelberg 1995)
2. 3.2 See, for instance, Proc. Int’l Conf. on Spectral Line Shapes,
3. Vol.1, ed. by B. Wende (De Gruyter, Berlin 1981)
4. Vol.2, ed. by K. Burnett, 5th Int’l Conf., Boulder 1980 (De Gruyter, Berlin 1983)
5. Vol.3, ed. by F. Rostas, 8th Int’l Conf., Aussois 1984 (De Gruyter, Berlin 1985)