References:
1. Ottosen, Lisbeth M.; Ribeiro, Alexandra B. (2018). "Comparative life cycle assessment of water meter technologies". Science of the Total Environment. 631–632: 502–513.
2. Tang, Yu-Feng; Tai, Hongyun; Chen, Shouyu (2018). "Water pricing and water metering in China:Development status and challenges". Science of the Total Environment. 633: 908–917.
3. Singh, Jaskirat; Ogie, Richard; Sweetman, Andrew J.; Brown, Scott; Anda, Martin (2017). "Applying life cycle thinking to minimize the environmental footprint of water meters: From conventional residential meters to smart water meters". International Journal of Life Cycle Assessment. 22 (5): 797–808.
4. Gomiero, Tiziano; Cucchiella, Federica; Toyasaki, Fuminori (2019). "Environmental and economic assessment of eco-sustainable solutions for water metering: a comparative case study in Italy". Journal of Cleaner Production. 238: 117978.
5. Kim, Young-Duk; Jo, Hongkyun; Lee, Sang-Heon; Song, Kyoung-Sik; Yoon, Yong-Hee (2018). "Economic and Environmental Impacts of Introducing a Water Meter System in Multi-Family Housing Units in Seoul". Sustainability. 10 (10): 3636.