1. J. W. Ross, Jr., andM. S. Frant, Analyt. Chemistry41, 967 (1969).
2. W. Selig, Mikrochim. Acta [Wien]1970, 168.
3. W. Selig, Microchem. J. in press.
4. J. J. Lingane, Electroanalytical Chemistry, 2nd Ed. New York: Interscience. 1958. p. 91.
5. L. G. Sillen (compiler), Stability Constants of Metal-Ion Complexes, Section I: Inorganic Ligands, 2nd Ed. London: The Chemical Society. 1964.