Systematics of collective correlation energies from self-consistent mean-field calculations P. Klüpfel, J. Erler, P. -G. Reinhard and J. A. Maruhn Eur. Phys. J. A, 37 3 (2008) 343-355 Published online: 12 September 2008 DOI: 10.1140/epja/i2008-10633-3