The states 11Σu+, 11Πu and 21Σu+ of Sr2 studied by Fourier-transform spectroscopy A. Stein, H. Knöckel and E. Tiemann Eur. Phys. J. D, 64 2-3 (2011) 227-238 Published online: 13 September 2011 DOI: 10.1140/epjd/e2011-20229-6