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. 2017 Feb 10;7:42082. doi: 10.1038/srep42082

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Temporal waveforms of (a) f_rep1, (b) f_rep2, (c) f_beat1, (d) f_beat2, (e) m, and (f) f_THz when f_THz was fixed at 100,020,240,000 Hz. The measurement rate was 100 Hz.