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\bibitem{Lindgren_etal1998} Lindgren, M., Currie, M., Zeng, W. - S., Sobolewski, R., Cherednichenko, S., Voronov, B., et al. (1998). Picosecond response of a superconducting hot-electron NbN photodetector. \textit{Appl. Supercond.}, \textit{6}(7-9), 423--428.

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