Radio-frequency association of molecules: an assisted Feshbach resonance Q. Beaufils, A. Crubellier, T. Zanon, B. Laburthe-Tolra, É. Maréchal, L. Vernac and O. Gorceix Eur. Phys. J. D, 56 1 (2010) 99-104 Published online: 06 November 2009 DOI: 10.1140/epjd/e2009-00269-3