1. J. Chao, Thermochim. Acta,1, 71 (1970).
2. JANAF Thermochemical Tables, 2nd Edition, NSRDS-NBS-37, Washington, D.C. (1971).
3. L. N. Gorokhov, Doctoral Thesis, Moscow State University (1972).
4. P. A. Akishin and N. G. Rambidi, Zh. Neorg. Khim.,5, 23 (1960).
5. P. A. Akishin, M. I. Vinogradov, K. D. Danilov, N. P. Levkin, E. I. Martinson, N. G. Rambidi, and V. P. Spiridonov, Prib. Tekh. Éksp.,2, 70 (1958).