Regoutz, A., Oropeza, F. E., Poll, C. G., Payne, D. J., Palgrave, R. G., Panaccione, G., Borgatti, F., Agrestini, S., Utsumi,
Y., Tsuei, K. D., Liao, Y. F., Watson, G. W., & Egdell, R. G. (2016). Identification
of metal s states in Sn-doped anatase by polarisation dependent hard X-ray photoelectron spectroscopy.
Chemical Physics Letters, 647, 59-63. doi:10.1016/j.cplett.2016.01.013.