1. ?State primary standard and All-Union calibration scheme for devices for measuring temperature in the 273.15-6300 K range,? GOST 8.080-80.
2. ?State calibration scheme for temperature measuring devices,? GOST 8.558-93.
3. V. A. Kovalevskii, Prib. Tekhn. Éksp., No. 3, 98 (1959).
4. G. S. Ambrok et al., Methods and Devices for Optical Pyrometry [in Russian], Nauka, Moscow (1983), p. 93.