PT Unknown AU Merkel, H Khosropanah, P Yagubov, P Kollberg, E TI A hot spot mixer model for superconducting phonone–cooled HEB far above the quasipartical band gap SE Proc. 10[super:th] Int. Symp. Space Terahertz Technol. PY 1999 BP 592 EP 606 PI Charlottesville, Virginia ER