Isotopomer selective optimization of 39K85Rb+ and 41K87Rb+ using optimal control A. Merli, F. Sauer, L. Wöste and A. Lindinger Eur. Phys. J. D, 42 2 (2007) 217-220 Published online: 31 January 2007 DOI: 10.1140/epjd/e2007-00021-1