Conserving quasiparticle calculations for small metal clusters G. Pal, Y. Pavlyukh, H. C. Schneider and W. Hübner Eur. Phys. J. B, 70 4 (2009) 483-496 Published online: 21 July 2009 DOI: 10.1140/epjb/e2009-00253-9