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\bibitem{Trifonov_etal1996} Trifonov, V. A., Karasik, B. S., Zorin, M. A., Gol{\textquoteright}tsman, G. N., Gershenzon, E. M., Lindgren, M., et al. (1996). 9.6 μm wavelength mixing in a patterned YBa$_{2}$Cu$_{3}$O$_{7-δ}$ thin film. In \textit{Proc. 7$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 337--348).

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