Willner, A., Hage, A., Riedel, R., Grguraš, I., Simoncig, A., Schulz, M., et al. (2012).
Coherent spectral enhancement of carrier-envelope-phase stable continua with dual-gas high harmonic generation.
Optics Letters, 37(17), 3672-3674. doi:10.1364/OL.37.003672.