Ultracold atoms confined in rf-induced two-dimensional trapping potentials Y. Colombe, E. Knyazchyan, O. Morizot, B. Mercier, V. Lorent and H. Perrin Europhys. Lett., 67 4 (2004) 593-599 Published online: 01 August 2004 DOI: 10.1209/epl/i2004-10095-7