1. Birks, R., Colbourne, J., Hills, S., & Hobson, R. (2004). Microbiological water quality in a large in-building recycling facility. Water Science and Technology, 50(2), 165–172.
2. Christova-Boal, D., Eden, R. E., & McFarlane S. (1996). An investigation into greywater reuse for urban residential properties. Desalination, 106, 391–397.
3. Gerba, C. P., & Rose, J. B. (2003, November). The indicator concept in wastewater reclamation: Past, present and future. Paper presented at the 4th International Symposium on Wastewater Reclamation and Reuse, Mexico City.
4. Holden, B., & Ward, M. (1998, December). An overview of domestic and commercial re-use of water. Paper presented at the IQPC Conference on Water Recycling and Effluent Re-use, London.
5. Laine, A. (2001). Technology for greywater recycling in buildings. PhD thesis, Cranfield University, Cranfield, Bedfordshire, UK.