Properties of doubly excited states of H- and He associated with the manifolds from N = 6 up to N = 25 S. I. Themelis, Y. Komninos and C. A. Nicolaides Eur. Phys. J. D, 18 3 (2002) 277-293 Published online: 15 March 2002 DOI: 10.1140/epjd/e20020032