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2. Iyengar, G. V., Kollmer, W. E. & Bowen, H. J. M.: “The Elemental Composition of Human Tissues and Body Fluids”, Verlag Chemie, Weinheim 1978
3. National Bureau of Standards (USA): Certificate of Analysis for Standard Reference Material 1577, Bovine Liver, NBS, Washington, 1977
4. Parr, R. M.: Intercomparison of Minor and Trace Elements in IAEA Animal Muscle (H-4), Report No. IAEA/RL/69, IAEA, Wien (1980)
5. Iyengar, G. V. (in Vorbereitung)