1. A.K. Misra and J.D. Whittenberger: NASA TM 87320, May, 1986.
2. H.A. Laitiren, W. Ferguson, and R.A. Osteryoung:J. Electrochem. Soc. 104, 1957, 516.
3. I. Barlin and O. Kancke:Thermochemical Properties of Inorganic Substances, Springer-Verlag, 1973.
4. JANAF Thermochemical Tables, 2nd ed., National Bureau of Standards 37, US Dept of Commerce, 1971 and Supplements.