1. F. D. Richardson,J. Iron Steel Inst. 175, 33 (1953).
2. O. Kubaschewski, E. L. Evans, and C. B. Alcock,Metallurgical Thermochemistry (Pergamon Press, Oxford, 1967).
3. T. B. Reed,Free Energy of Formation of Binary Compounds: An Atlas of Charts for High Temperature Chemical Calculations (M.I.T. Press, Cambridge, Mass., 1971).
4. C. E. Wicks and F. E. Block,Bur. Mines Bull. 605 (1973).
5. E. Rudy, ?Ternary Phase Equilibria in Transition Metal-Boron, Carbon, Silicon Systems,? Part V, ?Compendium of Phase Diagram Data,? AFML-TR-65-2, Wright-Patterson Air Force Base, Ohio, (1967).