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\bibitem{Ilin_etal1998} Il{\textquoteright}in KS, Milostnaya II, Verevkin AA, Gol{\textquoteright}tsman GN, Gershenzon EM, Sobolewski R. Ultimate quantum efficiency of a superconducting hot-electron photodetector. Appl Phys Lett. 1998;73(26):3938--40.

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