Photoemission time versus streaking delay in attosecond time-resolved solid state photo-emissionAndreas Gebauer, Sergej Neb, Walter Enns, Ulrich Heinzmann, Andrey K. Kazansky and Walter PfeifferEPJ Web Conf., 205 (2019) 02019DOI: https://doi.org/10.1051/epjconf/201920502019