1. 2. H. Michibata and K. Kanamori, in “Vanadium in the Environment. Part 1: Chemistry and Biochemistry”, ed. J. O. Nriagu, 1998, John Wiley & Sons, New York, 217.
2. 3. T. Ishii, in “Vanadium in the Environment. Part 1: Chemistry and Biochemistry”, ed. J. O. Nriagu, 1998, John Wiley & Sons, New York, 199.
3. Fractional determination of nanogram amounts of vanadium(IV) and vanadium(V) in natural water by a catalytic method combined with solvent extraction.