1. BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, Guide to the Expression of Uncertainty in Measurement, International Organization for Standardization, Geneva, Switzerland, 1995.
2. An Introduction to Uncertainty in Measurement: Using the GUM;Kirkup,2006
3. B.N. Taylor, C.E. Kuyatt, NIST Technical Note 1297: Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 1994.
4. US Guide to the Expression of Uncertainty in Measurement (ANSI/NCSL Z540-2-1997), American National Standards Institute, 1997.
5. CODATA recommended values of the fundamental physical constants: 2006;Mohr;Rev. Mod. Phys.,2008