DS/CWA 16975:2015, KøbenhavnDS projekt: M302810ICS: 27.010; 91.140.10, Miljøeffektive transformerstationer til fjernvarme, Eco-efficient Substations for District Heating.  Mieczysław Dzierzgowski: Thermal resistance of the Heat exchangers as a function of the "Pinch" and "Drive" temperatures, Eco-efficient Substations meeting, Brussels, march 2014, Raportv.1.1 md (niepublikowany).  European standard EN 1148:1998, EN 1148:1998/A1:2005 (Heat exchangers standard): Standard specifies test procedures for establishing the performance data of water to water heat exchangers for district heating.  European standard EN 247:1997 (Heat exchangers standard): Standard specifies heat exchangers terminology.  European standard EN 12828:2012 (Heating systems in buildings standard): Standard specifies the design of water based heating systems.