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Yagoubov, P., Kroug, M., Merkel, H., Kollberg, E., Schubert, J., Hubers, H. W., et al. (1999). Hot electron bolometric mixers based on NbN films deposited on MgO substrates. In Inst. Phys. Conf. Ser. (Vol. 167, pp. 687–690). Barcelona, Spain.
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Merkel, H., Khosropanah, P., Yagubov, P., & Kollberg, E. (1999). A hot spot mixer model for superconducting phonone–cooled HEB far above the quasipartical band gap. In Proc. 10th Int. Symp. Space Terahertz Technol. (pp. 592–606). Charlottesville, Virginia.
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