1. Calcium phosphate precipitation at slightly alkaline pH values;Ferguson;J. WPCF,1973
2. EPA, Calcium phosphate precipitation in wastewater treatment, EPA-R2-72-064, Office of Research and Monitoring, U.S. Environmental Protection Agency, Washington, DC (1972).
3. Water Chemistry;Snoeyink,1980
4. Phosphorus recovery from synthetic swine wastewater by chemical precipitation using response surface methodology;Ye;J. Hazard. Mater.,2010