7Brothers K J.Practical Approach Initiatives to Water Loss Reduction.International Conference and Workshops on Effident management of Water Systems.Italy,2006.
8Hirner W,Lambert A O.Losses from Water Supply Systems:Standard Terminology and Recommended Performance Measures.www.iwahq.org.uk/bluepages.
9Lambert A O.Assessing Non-Revenue Water and its Components:A Practical Approach.Water 21Magazine.www.iwahq.org.uk/bluepages.