1. BIPM, IEC, IFCC, ILAC, IUPAC, IUPAP, ISO, OIML (2008) The international vocabulary of metrology—basic and general concepts and associated terms (VIM), 3rd edn. JCGM 200. http://www.bipm.org/en/publications/guides/vim.html , entry 2.41
2. Ibidem, entry 5.14
3. Ibidem, entry 5.1
4. Ibidem, entry 5.12
5. Ibidem, entry 2.46