GOST 26809-1986 Milk and milk products. Acceptance regulations, methods of sampling and preparation for testing
GOST R ISO 5725-1-2002 Accuracy (trueness and precision) of measurement methods and results. Part 1. General principles and definitions
GOST R ISO 5725-2-2002 Accuracy (trueness and precision) of measurement methods and results. Part 2. Basic method for the determination of repeatability and reproducibility of a standard measurement method