Strong impact of the electron-photon matrix element on angle-resolved photoelectron spectra of Sr2CuO2Cl2 S. Haffner, M. Schmidt, P. J. Benning, C. G. Olson, L. L. Miller and D. W. Lynch Eur. Phys. J. B, 23 1 (2001) 69-77 Published online: 15 September 2001 DOI: 10.1007/s100510170083