1. G. Hanrahan, P. Gardolinski, M. Gledhill, P. Worsfold, in: F.R. Burden, I. McKelvie, U. Forstner, A. Guenther (Eds.), Environmental Monitoring Handbook, McGraw-Hill, New York, 2002, p. 8.1.
2. Standard Methods for the Examination of Water and Waste Water, 17th ed., American Public Health Association, American Water Works Association and Water Pollution Control Federation, Washington, 1985.
3. Application of flowing stream techniques to water analysis. Part I. Ionic species: dissolved inorganic carbon, nutrients and related compounds
4. Determination of carbon, phosphorus, nitrogen and silicon species in waters
5. The automatic determination of silicate-silicon in natural waters with special reference to sea water