Anomalous electronic behaviour of Na superfullerides: theory and experiment W. Andreoni, P. Giannozzi, J. F. Armbruster, M. Knupfer and J. Fink Europhys. Lett., 34 9 (1996) 699-704 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00517-6