1. J. S. Kasper, P. Hagenmuller, M. Pouchard, and C. Cros, Science150, 17131965. [C. Cros, M. Pouchard, and P. Hagenmuller, C. R. Acad. Sc.260, 4764 1965; C. Cros, M. Pouchard, P. Hagenmuller, and J. S. Kasper, Bull. Soc. Chim. France7, 2737 1968; C. Cros, M. Pouchard, and P. Hagenmuller, J. Solid State Chem.2, 570 1970].
2. Inclusion Compounds, Vol. I;Jeffrey,1984
3. G. B. Adams, M. O'Keeffe, A. A. Demkov, O. F. Sankey, and Y. Huang, Phys. Rev. B49, 80481994. [A. A. Demkov, O. F. Sankey, K. E. Schmidt, G. B. Adams, and M. O'Keeffe, Phys. Rev. B50, 170011994].
4. Superconductivity in the Silicon Clathrate Compound (Na,Ba)xSi46
5. Superconductivity at 18 K in potassium-doped C60