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\bibitem{Lang_etal1992} Lang, P. T., Knott, W. J., Leipold, I., Renk, K. F., Semenov, A. D., \& Gol{\textquoteright}tsman, G. N. (1992). Generation and detection of tunable ultrashort infrared and far-infrared radiation pulses of high intensity. \textit{Int. J. of Infrared and Millimeter Waves}, \textit{13}(3), 373--380.

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