1. BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, International Vocabulary of Basic and general terms in Metrology, Second Edition, 1994.
2. Recommendation INC-1, 1980, Expression of experimental uncertainties.
3. Recommendation 1 Cl-1981, Expression of experimental uncertainties.
4. Recommendation 1 Cl-1986, Expression of uncertainties in work carried out under the auspices of the CIPM.
5. BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, Guide to the expression of uncertainty in measurement, ISO Genève, 1993.