1. Barber, C. R., Temperature, Its Measurement and Control in Science and Industry 3: 103 (1962).
2. Bergmann, L., Der Ultraschall: 501 (1954).
3. BERMAN, R, ABSOLUTE TEMPERATURE SCALE BETWEEN 4.2-DEGREES-K AND 5.2-DEGREES-K, PHYSICAL REVIEW 95: 311 (1954).
4. Borovick-Romanov, A. C., Temperature, Its Measurement and Control in Science and Industry 3: 113 (1962).
5. 6 COMPT REND COM INT 1962