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\bibitem{Maslennikov_etal2002} Maslennikov, S., Antipov, S., Shishkov, A., Svechnikov, S., Voronov, B., Smirnov, K., et al. (2002). NbN HEB mixer noise temperature measurements with hot/cold load mounted inside the helium cryostat at 300 GHz. In \textit{Proc. Int. Student Seminar on Microwave Appl. of Novel Physical Phenomena supported by IEEE}. St.-Petersburg: LETI.

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