1. A. Anttila, J. Raisanen and J. Keinonen. J. Appl. Phys. Letters, 42, 498 (1983).
2. D.D. Harbuck, C.F. Davidson and M.B. Shirt. J. Metals, 38, 47 (1986).
3. L.E. Toth. In: Transition Metal Carbides and Nitrides, (Academic Press, New York, NY, 1971), 12.
4. L. Maya. In: Better Ceramics Through Chemistry, II. C.J. Binker, D.E. Clark and D.R. Ulrich, Eds, (Materials Research Society, Pittsburgh, PA, 1986), 401–406.
5. V.D. Parkhomenko, G.N. Serdyuk and Yu.I. Krasnokutskii. Phys. Chem. Mat. Process. (Russian) 5, 78 (1986).