1. J. D. Cox, D. D. Wagman, and V. A. Medvedev, CODATA Key Values for Thermodynamics (Chemisphere, New York, 1989), p. 268.
2. Yu. V. Goryushkina, A. S. Monaenkova, A. A. Popova, and L. A. Tiflova, Zh. Fiz. Khim. (in press).
3. C. Hurtgen, D. Brawn, and J. Fuger, J. Chem. Soc., Dalton Trans., pp. 70–75 (1980).
4. H. Bommer and E. Hohmann, Z. Anorg. Allg. Chem. 248, 383–396 (1941).
5. A. E. Vorob’ev, A. S. Monaenkova, and E. B. Pashlova, Zh. Obshch. Khim. 48(1), 6 (1978).