1. Miller, T.M., Bederson, B.: Advances in atomic and molecular physics, vol. 13, p. 1. Bates, D.R., Bederson, B. (eds.). New York: Academic Press 1977
2. Miller, T.M.: Handbook of chemistry and physics, p. E66. Weast, R.C. (ed.) Boca Raton: CRC Press 1987
3. Miller, T.M., Bederson, B.: Advances in atomic and molecular physics, vol. 25, p. 37. Bates, D.R., Bederson, B. (eds.). New York: Academic Press 1988
4. Rinkleff, R.-H., Steudel, A., Zeiske, K.: Z. Phys. D18, 101 (1991)
5. Burow, D., Rinkleff, R.-H.: Arab. J. Sci. Eng.17, 287 (1992)