@inbook{inbook6636aeb7,
title   = {Hydraulic characteristics of pressure reducing valves for maximum reduction of leakage in water supply networks},
author = {Reis, Luisa Fernanda Ribeiro and Chaudhry, Fazal Hussain},
year = {1999},
publisher = {Research Studies},
journal   = {Water industry systems : modelling and optimization applications}
}