Slow-molecule detection in Doppler-free two-photon spectroscopy P. E. Durand, G. Nogues, V. Bernard, A. Amy-Klein and Ch. Chardonnet Europhys. Lett., 37 2 (1997) 103-108 Published online: 01 September 2002 DOI: 10.1209/epl/i1997-00118-y