1. See articles in (a)Elemental and Molecular Clusters, edited by G. Benedek and M. Pacchioni (Springer, Berlin, 1988); (b)Physics and Chemistry of Small Clusters, edited by P. Jena, S.N. Khanna, and B.K. Rao (Plenum, New York, 1987); (c)Physics and Chemistry of Finite Systems: From Clusters to Crystals, edited by P. Jena, S.N. Khanna, and B.K. Rao (Kluwer, Dordrecht, 1992).
2. See articles in (a)Elemental and Molecular Clusters, edited by G. Benedek and M. Pacchioni (Springer, Berlin, 1988); (b)Physics and Chemistry of Small Clusters, edited by P. Jena, S.N. Khanna, and B.K. Rao (Plenum, New York, 1987); (c)Physics and Chemistry of Finite Systems: From Clusters to Crystals, edited by P. Jena, S.N. Khanna, and B.K. Rao (Kluwer, Dordrecht, 1992).
3. (c)Physics and Chemistry of Finite Systems: From Clusters to Crystals, edited by P. Jena, S.N. Khanna, and B.K. Rao (Kluwer, Dordrecht, 1992).
4. H.-P. Kaukonen, U. Landman, and C.L. Cleveland, J. Chem. Phys.95, 4997 (1991).
5. See articles inNuclear Physics Concepts in Atomic Cluster Physics, edited by R. Schmidtet al. (Springer, Berlin, 1992).