The states 11Σu+, 11Πu and 21Σu+ of Sr2 studied by Fourier-transform spectroscopyA. Stein, H. Knöckel and E. TiemannEur. Phys. J. D, 64 2-3 (2011) 227-238DOI: https://doi.org/10.1140/epjd/e2011-20229-6