1. AGFW FW114. Strategies for maintenance and planning of rehabilitation. The Energy efficiency Association of heat, cold and combined heat and power; 2013.
2. EN 253. District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene. Berlin: Beuth Verlag; 2015.
3. EN 13941. Design and installation of preinsulated bonded pipe systems for district heating. Berlin: Beuth Verlag; 2010.
4. Hoffmann HW, Grage T, Rose A. Remaining useful life of pre-insulated bonded pipes. Euroheat&Power journal 2002; 3(31).
5. Herbst V. Zustandsanalyse betrieblich gealterter Kunststoffmantelrohre Teil 1 und Teil 2. Untersuchungen zur axialen Scherfestigkeit. EuroHeat&Power 2015; 44(10-11).