1. Abels, L. L., Shaw, J. H. 1966, J. molec. Spectrosc., 20, 11.
2. Aberth, W., Sunshine, G., Bederson, B. 1964, see ref. 307, p. 53.
3. Abiodun, R. A., Seaton, M. J. 1966, Proc. phys. Soc., London, 87, 145.
4. Aleskovskii, Yu. M. 1963, Soviet Phys. JETP, 17, 570.
5. Alexander, E., Feldman, U., Fraenkel, B. S., Hoory, S. 1966, J. opt. Soc. Am., 56, 651.