A rubidium-stabilized ring-cavity resonator for optical frequency metrology: precise measurement of the D1 line in 133CsD. Das, A. Banerjee, S. Barthwal and V. NatarajanEur. Phys. J. D, 38 3 (2006) 545-552DOI: https://doi.org/10.1140/epjd/e2006-00065-7