1. J. Davenas, P. Rabette “Contributions of Cluster Physics to Material Science and Technology”, Nijhoff eds., Amsterdam, (1986).
2. R. Car, M. Parrinello, Phys. Rev. Lett., 55, 2471, (1985).
3. Readings for updating theoretical background may extend from simple text books for graduate students to more elaborate works like: C. Cohen-Tannoudji, B. Diu, F. Laloë, “Quantum Mechanics”, Wiley ed.
4. A. Szabo, Neil S. Ostlund, “Modern Quantum Chemistry”, Mac Milian ed., (1982).
5. J.L. Rivail, “Elements de Chimie Quantique”, Intereditions/ed. du C.N.R.S., (1989).