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.
Drinking water supply from small units and non stationary plants - Part 2: Non stationary units - Guidelines for drinking water, planning, construction, operation and maintenance of units; Technical rule of the DVGW— 40 стр.