1. Blazewicz, P.R., Tang, X., Comton, R.N., Stockdale, J.A.D.: J. Opt. Soc. Am. B.4, 770 (1987)
2. See e.g. Fano, U., Macek, J.: Rev. Mod. Phys.45, 553 (1973)
3. Andrä, H.J.: In: Progress in atomic spectroscopy. Hanle, Kleinpoppen, H. (ed.) New York: Plenum Press 1979
4. Leuchs, C., Walter, H.: Angular distributions of photoelectron and light polarization effects in multiphoton ionization of atoms. In: Multiphoton ionization of atoms. Chin, S.L., Lambropoulos, P. (ed.) London: Academic Press 1984
5. Kruit, P., Muller, H.G., Kimman, J., van der Wiel, M.J.: J. Phys. B16, 2359 (1983)