1. R. G. Breene, Jr., The Shape and Shift of Spectral Lines (Pergamon Press, Inc., New York, 1961)
2. and G. Traving, Uber die Theorie der Druckverbreiterung von Spektrallinien (Verlag G. Braun, Karlsruhe, Germany, 1960).
3. P. W. Anderson, Phys. Rev. 76, 647 (1949).PHRVAO0031-899X
4. See for example: W. V. Smith, H. A. Lackner, and P. B. Volkov, J. Chem. Phys. 23, 389 (1955) JCPSA60021-9606
5. and L. J. Kieffer and A. V. Bushkovitch, J. Mol. Spectry. 2, 558 (1958) and references cited therein for a discussion of various approximate calculations.JMOSA30022-2852