Limits on collective X-ray scattering imposed by coherence G. Gregori, R. Tommasini, O. L. Landen, R. W. Lee and S. H. Glenzer Europhys. Lett., 74 4 (2006) 637-643 Published online: 14 April 2006 DOI: 10.1209/epl/i2005-10570-7