Terahertz Spectroscopy of Gas Absorption Using the Superconducting Flux-Flow Oscillator as an Active Source and the Superconducting Integrated Receiver. - Nickolay V. Kinev; Kirill I. Rudakov; Lyudmila V. Filippenko; Andrey M. Baryshev; Valery P. Koshelets (Sensors, 2020)