Direct observation of ultrafast exciton localization in an organic semiconductor with soft X-ray transient absorption spectroscopy oleh D. Garratt, L. Misiekis, D. Wood, E. W. Larsen, M. Matthews, O. Alexander, P. Ye, S. Jarosch, C. Ferchaud, C. Strüber, A. S. Johnson, A. A. Bakulin, T. J. Penfold, J. P. Marangos