Lindner, F., Stremme, W., Schätzel, M. G., Grasbon, F., Paulus, G. G., Walther, H., et al. (2003). High-order harmonic generation at a repetition rate of 100 kHz. Physical Review A, 68(1): 013814, pp. 1-8. doi:10.1103/PhysRevA.68.013814.