Compressibility crossover and quantum opening of a gap for two-dimensional disordered clusters with Coulomb repulsionG. Benenti, X. Waintal, J.-L. Pichard and D. L. ShepelyanskyEur. Phys. J. B, 17 3 (2000) 515-521DOI: https://doi.org/10.1007/s100510070129