Analysis of the first electron-removal states of Ba2Cu3O4Cl2using polarization dependent angle-resolved photoelectron spectroscopyS. Haffner, M. Knupfer, S. R. Krishnakumar, K. Ruck, G. Krabbes, M. S. Golden, J. Fink and R. L. JohnsonEur. Phys. J. B, 14 2 (2000) 251-261DOI: https://doi.org/10.1007/s100510050127