1. What is Non-revenue Water? How Can We Reduce it for Better Water Service?http://blogs.worldbank.org/water/what-non-revenue-water-how-can-we-reduce-it-better-water-service
2. The Challenge of Reducing Non-Revenue Water (NRW) in Developing Countries - How the Private Sector Can Help: A Look at Performance-based Service Contractinghttp://documents.vsemirnyjbank.org/curated/ru/385761468330326484/The-challenge-of-reducing-non-revenue-water-NRW-in-developing-countries-how-the-private-sector-can-help-a-look-at-performance-based-service-contracting
3. Compilation of investigation on water loss rate of water supply pipelines in global major cities;Cao;Water Purification Teochnwledge,2017
4. Development of water leak detection method in fusion reactors using water-soluble gas