1. A. A. Kulikovskii, Linear Stages of Radio Receivers [in Russian] (Gosénergoizdat, 1958).
2. A. D. Kuz'min, Noise Factor Measurements in Receiving Devices with Amplification [in Russian] (Gosénergoizdat, 1955).
3. A. D. Kuz'min and A. E. Salomonovich, Radiometric Methods for Measuring Antenna Parameters [in Russian] (Izd. ?Sovetskoe radio,? 1964).
4. L. D. Landau and E. M. Livshits, Statistical Physics [in Russian] (GITTL, 1951).
5. G. Broussaud and B. Richard, Annales de radioelectricite, IV,18, No. 72 (1963).