A high phase-space density mixture of 87Rb and 133Cs: towards ultracold heteronuclear moleculesH.W. Cho, D.J. McCarron, D. L. Jenkin, M. P. Köppinger and S. L. CornishEur. Phys. J. D, 65 1-2 (2011) 125-131DOI: https://doi.org/10.1140/epjd/e2011-10716-1