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\bibitem{Maslennikov_etal2004} Maslennikov, S., Vachtomin, Y., Antipov, S., Smirnov, K., Kaurova, N., Grishina, E., et al. (2004). NbN HEB mixers for frequencies of 2.5 and 3.8 THz. In \textit{Proc. Tenth All-Russian sceintific conference of student-physicists and young sceintists (VNKSF-10)}. Moscow.

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