1. MI 3238–2009, Recommendations. GSI. State Accuracy Chart for Measuring Instruments (analytic devices) for Measurement of the Content of Components in Liquid and Solid Substances and Synthetic Materials [in Russian].
2. Yu. N. Levchenko et al., “Coulometric titration, an efficient and precise method of determining the fraction of total mass of a basic substance in standard samples of the composition of substances (synthetic materials) and substances of high purity,” Stand. Obraztsy, No. 1, 21–26 (2005).
3. “CODATA recommended values of the fundamental physical constants: 2006,” Rev. Modern Phys., 80, No. 2, 668–730 (2008).
4. GOST R 8.600–2003, GSI. Techniques of Execution of Measurements of Fraction of Total Mass of Basic Substance of Reagents and Especially Pure Substances by Means of Titration Methods. Basic Requirements [in Russian].
5. Guide to the Expression of Uncertainty in Measurement, ISO, Geneva (1993);