Damages of the Tallinn district heating networks and indicative parameters for an estimation of the networks general conditionHlebnikov, Aleksandr; Volkova, Anna; Dzuba, Olga; Poobus, Arvi; Kask, ÜloScientific journal of Riga Technical University. Serija 13, Environmental and climate technologies2010 / p. 49-55 : ill https://sciendo.com/article/10.2478/v10145-010-0034-3