1. Carcinotron TH-4218, Thompson-CSF, Boulogne-Billancourt, France
2. Lance, A.L., Seal, W.D., and Labaar, F.: ‘Phase noise and AM noise measurements in the frequency domain’, Button, J., Series on infrared and millimeter waves, (Academic Press 1984),11, Chap. 7,
3. Goldsmith, P.F.: ‘Quasi-optical techniques at millimeter and submillimeter wavelengths’, Button, J., Series on infrared and millimeter waves, (Academic Press 1982),6, Chap. 5,