Soft–X-ray fluorescence of porous silicon: electronic structure of Si nanostructuresS. Eisebitt, S. N. Patitsas, J. Lüning, J.-E. Rubensson, T. Tiedje, T. van Buuren and W. EberhardtEurophys. Lett., 37 2 (1997) 133-138DOI: https://doi.org/10.1209/epl/i1997-00122-9