Gousev, Y. P., Olsson, H. K., Gol'tsman, G. N., Voronov, B. M., & Gershenzon, E. M. (1998). NbN hot-electron mixer at radiation frequencies between 0.9 THz and 1.2 THz. In _Proc. 9<sup>th</sup> Int. Symp. Space Terahertz Technol._ (pp. 121&ndash;129).