1. General Requirements for the Competence of Testing and Calibration Laboratories;ISO/IEC 17025:2005,2010
2. Viscosity of Water;ISO/TR3666:1998,1998
3. absolute viscosity of water at 20°C;Swindells;J. Res. NBS,1954
4. OIML D17:1987, Hierarchy Scheme for Instruments Measuring the Viscosity of Liquids, https://www.oiml.org/en/files/pdf_d/d017-e87.pd.
5. JCGM 200:2012, International Vocabulary of Metrology. Basic and General Concepts and Associated Terms (VIM), http://www.bipm.org/en/publications/guides/vim.htm.