6E.Ya.Sokolov,A.V.lz bekov. Quantitative Calculation of Heat Supply System Thermal Engineering. English Translation of Teplocnergetika.1990 ,37 (9) :495.
7Petersen, Harald. Procedure when Failures Occur in the District Heating Supply. Euroheat and Power. 2003,32(4) :38-43.
8Helge.V.Larsen. Aggregated Dynamic Simulation Model of District Heating Networks. Energy Conversion and Management. 2002,43 (8) : 995-101.