1. Andreae, M. O.: Determination of arsenic species in natural waters, Anal. Chem., 49, 820–825, 1977.
2. APHA, AWWA and WEF: Standard Methods for the Examination of Water and Wastewater, 13th Edn., American Public Health Association, American Water Works Association and Water Environment Federation, Washington, DC, 62–66, 1971.
3. APHA, AWWA and WEF: Standard Methods for the Examination of Water and Wastewater, 18th Edn., American Public Health Association, American Water Works Association and Water Environment Federation, Washington, DC, 3–50, 1992.
4. Calvert, C. C.: Arsenicals in animal feeds and wastes, in: Arsenical Pesticides, edited by: Woolson, E. A., Washington, DC, American Chemical Society (ACS Symp. Series No. 7), 1975.
5. Carapella, S. C.: Arsenic and compounds, in: The encyclopedia of chemistry, third edn., edited by: Hampel, C. A. and Hawley, G. G., New York, Van Nostrand Reinhold Company, 1973.