Millijoule-level sub-cycle pulses from two channels of a parallel parametric waveform synthesizerFabian Scheiba, Giulio Maria Rossi, Roland E. Mainz, Yudong Yang, Giovanni Cirmi and Franz X. KärtnerEPJ Web Conf., 205 (2019) 01011DOI: https://doi.org/10.1051/epjconf/201920501011