1. M. P. Coughlan (1980) Molybdenum and Molybdenum Containing Enzymes, Pergamon, Oxford
2. Molybdenum enzymes, cofactors, and systems: The chemical uniqueness of molybdenum
3. E. J. Underwood (1977) Trace Elements in Human and Animal Nutrition, Academic Press, New York
4. WHO Expert Committee , Report No. 532, p. 43, Geneva, 1973