References
- Canfield, D. E. Jr. & Bachmann, R. W., 1981: Prediction of total phosphorus concentrations, chlorophyll-a and Secchi depths in natural and artificial lakes. — Can. J. Fish. Aquat. Sci. 38: 414–423.
- O.E.C.D., 1982: Eutrophication of waters: Monitoring, assessment and control. — O.E.C.D., Paris.