On energy efficiency of water distribution systemVaabel, Joonas; Koppel, Tiit; Ainola, LeoWater Management Challenges in Global Change : proceedings of the 9th Computing and Control for the Water Industry (CCWI2007) and Sustainable Urban Water Management (SUWM2007) Conferences : Leicester, UK, 3-5 September, 20072007 / p. 169-172 Use of pressure differentials for calibration of the operational water distribution systemVassiljev, Anatoli; Minguell Font, L.; Puust, RaidoWater Management Challenges in Global Change : proceedings of the 9th Computing and Control for the Water Industry (CCWI2007) and Sustainable Urban Water Management (SUWM2007) Conferences : Leicester, UK, 3-5 September, 20072007 / p. 205-209