Progress in the analysis of the even parity configurations of tantalum atom B. Arcimowicz, J. Dembczyński, P. Głowacki, J. Ruczkowski, M. Elantkowska, G.H. Guthöhrlein and L. Windholz Eur. Phys. J. Special Topics, 222 9 (2013) 2085-2102 Published online: 23 October 2013 DOI: 10.1140/epjst/e2013-01988-6