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\bibitem{MeledinD._etal2004} Meledin D., Pantaleev M., Pavolotsky A., Risacher C., Robles V.A.P., Belitsky V., et al. (2004). Design of a balanced waveguide HEB mixer for APEX 1.32 THz receiver. In \textit{Proc. 15$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 211--217).

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