From superradiant Rayleigh scattering to Bragg scattering L. De Sarlo, R. Saers, S. Bartalini, F. S. Cataliotti, L. Fallani, C. Fort, I. Herrera and M. Inguscio Eur. Phys. J. D, 32 2 (2005) 167-170 Published online: 21 September 2004 DOI: 10.1140/epjd/e2004-00124-1