Strong impact of the electron-photon matrix element on angle-resolved photoelectron spectra of Sr2CuO2Cl2S. Haffner, M. Schmidt, P. J. Benning, C. G. Olson, L. L. Miller and D. W. LynchEur. Phys. J. B, 23 1 (2001) 69-77DOI: https://doi.org/10.1007/s100510170083