1. The International Temperature Scale of 1990, BIPM, Paris (1989).
2. Expression of the Uncertainty of Measurement in Calibrations, EA 4/02 (1997).
3. Guide to the Expression of Uncertainty in Measurement, BIPM/IEC/ISO/OIML (1995).
4. P. Bloembergen, Metrologia, 32, 253 (1995/96).
5. P. Bloembergen, Metrologia, 33, 269 (1996).