1. W.M. Latimer, The Oxidation States of the Elements and Their Potentials in Aqueous Solutions, 2nd edn., New York, 1952.
2. I. Ginsburg et al., Himicheskii analiz platinovich metallov i zolota, M.: Nauka, 1965, p. 314.
3. G.S. Muraveyskaya et al., Abstracts of the 11 All-union Chernyaev Conference on Chemistry, Analysis and Technology of Platinum Metals, M.: Nauka, 1979, p. 9.