1. R. Y. P. Williams, New Trends in Bioinorganic Chemistry, Academic Press, London 1976.
2. M. Ebadi, J. Nutrition 2 (1985) 181.
3. L. Y. Bellamy, The Infrared Spectra of Complex Molecules, London 1975.
4. IRSCOT—Infrared Structural Correlation Tables and Data Cards, London NWH 1969.
5. M. A. Bernard and F. Busnot, Bull. Soc. Chim. France, 12 (1967) 4649.