Frontiers and challenges of the nuclear shell model T. Otsuka, Y. Utsuno, R. Fujimoto, B.A. Brown, M. Honma and T. Mizusaki Eur. Phys. J. A, 13 1-2 (2002) 69-74 Published online: 15 January 2002 DOI: 10.1140/epja1339-11