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\bibitem{Gershenzon_etal1982} Gershenzon, E. M., Goltsman, G. N., Multanovskii, V. V., \& Ptitsina, N. G. (1982). Kinetics of submillimeter impurity and exciton photoconduction in Ge. \textit{Optics and Spectroscopy}, \textit{52}(4), 454--455.

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