1. Saito, T. and Sakuma, Y., J. Jpn. Inst. Met., 1967, vol. 31, no. 10, p. 1140.
2. Cheng, C. and Xu, X., Int. J. Thermophys., 2007, vol. 28, no. 1, p. 9.
3. The periodic table of the elements. https://www.webelements.com.
4. Gamsjäger, H., Bugajski, J., Gajda, T., Lemire, R. J., and Preis, W., Chemical Thermodynamics of Nickel, Nuclear Energy Agency Data Bank, vol. 6 of Chemical Thermodynamics, Amsterdam: North Holland, 2005.
5. Desai, P.D., Int. J. Thermophys., 1987, vol. 8, no. 6, p. 763.