Zhang, Yu ; Kroll, Thomas ; Weninger, Clemens... Zhang, Yu, Kroll, Thomas, Weninger, Clemens, et al. "Generation of intense phase-stable femtosecond hard X-ray pulse pairs." Proceedings of the National Academy of Sciences, 119, no. 12 (2022) National Academy of Sciences: https://doi.org/10.1073/pnas.2119616119..
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2022