Non-ionic surface active agents - Determination of cloud point-index - Volumetric method (ISO 4320:1977, including Erratum:1980); German version EN ISO 4320:1997— 4 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.