1. I. V. Poroikov and N. M. Aruev, Proceedings of the All-Union Scientific Research Institute of Metrology [in Russian] No. 8 (1935), p. 24.
2. M. F. Yudin, Proceedings of the All-Union Scientific Research Institute of Metrology [in Russian] No. 30 (1957), p. 90.
3. Z. P. Balon and M. P. Maksimova, Proceedings of the All-Union Scientific Research Institute of Metrology, [in Russian], No. 35 (1961), p. 115.
4. K. K. Aglintsev and I. A. Bozhok, Proceedings of the All-Union Scientific Research Institute of Metrology, [in Russian], No. 25 (1939), p. 41.
5. Z. P. Balon, Proceedings of the All-Union Scientific Research Institute of Metrology, [in Russian] No. 30 (1957), p. 90.