Energies and electron correlation effects in two-electron doubly excited (n l)2 states M. Biaye, A. Konté, N. A.B. Faye and A. Wagué Eur. Phys. J. D, 13 1 (2001) 21-25 Published online: 15 January 2001 DOI: 10.1007/s100530170282