Plastics - Evaluation of disposability in waste water treatment plants - Test scheme for final acceptance and specifications; German version EN 14987:2006— 11 стр.
Treatment of water of swimming pools and baths - Part 5: Combinations of process using bromine as disinfectant, produced by ozonation of bromide-rich water— 24 стр.
Service activities relating to drinking water supply systems and wastewater systems - Guidelines for benchmarking of water utilities (ISO 24523:2017)— 28 стр.