1. Schwarz, K. andC. M. Foltz, J. Amer. Chem. Soc.79, 3292 (1957).
2. Gmelins Handbuch der anorganischen Chemie: Selen, Teil A 10, S. 22 (Weinheim 1953).
3. Kolthoff, J. H., P. J. Elving andE. B. Sandell, Treatise on Analytical Chemistry7, S. 141, 142, 214 (1961).
4. Manville, J. A., Amer. J. publ. Health29, 709 (1939).
5. Rosenfeld, J. and O. A.Beath, Selenium, Geobotany, Biochemistry, Toxicity and Nutrition, S. 41, 91, 120, 145, 182, 292 (New York, London 1964).