1. A. A. Radtsig and B. M. Smirnov, Handbook of Atomic and Molecular Physics [in Russian], Moscow (1986).
2. E. E. Nikitin and S. Ya. Umanskii, Semiempirical Methods for Calculation of Atomic Interaction Potentials Itogi Nauki Tekhn. VINITI. Ser. Stroen. Molekul. Khim. Svyaz' Moscow (1980).
3. Ph. Duranrd and J. P. Malriew, Ab Initio Methods of Quantum Chemistry (ed. K. P. Lawley, Chichester, etc.), New York (1987).
4. A. Z. Devdariani and A. L. Zagrebin, Khim. Plasmy,15, 44–93 (1989).
5. W. E. Baylis, J. Chem. Phys.,51, 2665–2674 (1969).