Li, C. - T., Chen, T. - J., Ni, T. - L., Lu, W. - C., Chiu, C. - P., Chen, C. - W., et al. (2009). Development of SIS mixers for SMA 400-520 GHz band. In _Proc. 20<sup>th</sup> Int. Symp. Space Terahertz Technol._ (pp. 24&ndash;30).