1. G. Kay and T. Labi, Handbook of an Experimental Physicist [Russian translation], IIL, Moscow (1949).
2. M. Sokolov (editor), Methods for Measuring Temperature [Russian translation], IIL, Moscow (1954).
3. N. N. Ergardt, Izmeritel'. Tekh., No. 10 (1968).
4. N. A. Bliskunov and I. Ya. Kamenetskii, Production Technology of Electric-Vacuum Instruments [in Russian], GÉI, Moscow-Leningrad (1959).