Butter - Determination of moisture, non-fat solids and fat contents - Part 1: Determination of moisture content (Reference method) (ISO 3727-1:2001); German version EN ISO 3727-1:2001— 7 стр.
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 (ISO 5725-2:1994 including Technical Corrigendum 1:2002)— 97 стр.