Accurate spectroscopy of Sr atomsI. Courtillot, A. Quessada-Vial, A. Brusch, D. Kolker, G. D. Rovera and P. LemondeEur. Phys. J. D, 33 2 (2005) 161-171DOI: https://doi.org/10.1140/epjd/e2005-00058-0