Stability of two-component alkali clusters formed on helium nanodropletsG. Droppelmann, M. Mudrich, C. P. Schulz and F. StienkemeierEur. Phys. J. D, 52 1-3 (2009) 67-70DOI: https://doi.org/10.1140/epjd/e2009-00071-3