Xie, X., Roither, S., Kartashov, D., Persson, E., Arbó, D. G., Zhang, L., Gräfe, S., Schöffler, M. S., Burgdörfer, J., Baltuška, A., & Kitzler, M. (2012). Attosecond probe of valence electron wavepackets by sub-cycle sculpted laser fields. Physical Review Letters, 108(193004). https://doi.org/10.1103/physrevlett.108.193004