J.  Weinen, Koethe, T. C., Chang, C. F., Agrestini, S., Kasinathan, D., Liao, Y. F., Fujiwara, H., Schüßler-Langeheine, C., Strigari, F., Haupricht, T., Panaccione, G., Offi, F., Monaco, G., Huotari, S., Tsuei, K. - D., and Tjeng, L. H., ?Polarization dependent hard X-ray photoemission experiments for solids: Efficiency and limits for unraveling the orbital character of the valence band?, Journal of Electron Spectroscopy and Related Phenomena, vol. 198, pp. 6-11, 2015.