• Use of relative roughness and changed diameters for old pipes when calibrating an operational water distribution systemVassiljev, Anatoli; Martaud, M.; Koppel, TiitIntegrating Water Systems : proceedings of the Tenth International Conference on Computing and Control in the Water Industry 2009 : CCWI2009 : Sheffield, UK, 1-3 September 20092009 / p. 283-286