1. V. I. Tret'yakov, Fundamentals of Metal Science and Technology of Production of Sintered Hard Alloys [in Russian], Metallurgiya, Moscow (1976).
2. N. K. Vaskevich, V. I. Tret'yakov, V. K. Senchikhin, et al., ?Special features of hydrogen reduction of metals from the CoWO4-WO3 mixture,? in: Dispersed Powders and Materials Based on Them [in Russian], Institute of Materials Science, Academy of Sciences of the Ukraine, Kiev (1976), pp. 42?46.
3. P. Bracconi and L. C. Dufour, ?Investigation of cobalt (2)-tungsten (6)-oxide reduction in hydrogen. Part 1,? Metall. Trans. B,7B, 321?327 (1976).
4. G. L. French and F. R. Sale, ?The hydrogen reduction of Co-W mixed oxides,? J. Mater. Sci.,20, No. 4, 1291?1299 (1985).
5. A. S. Petukhov, ?Chemical and phase transformations in reduction and carbidization of tungsten-cobalt compounds. I. Thermodynamic evaluation probability of reactions of reduction and carbidization of complex tungsten-cobalt oxide systems,? Poroshk. Metall., No. 4, 35?39 (1990).