1. Argon, A.S., 1987, Acta metall. 35:185.
2. Ashby, M.F. and Embury, J.D., 1985, Scr. metall. 19:557.
3. Azzouzzi, H., Michot, G. and George, A., 1991, in: “Proc. 9th Conf. on Strength of Metals and Alloys” Haifa
4. D.G. Brandon, R. Chain and A. Rosen, eds., Freund, London, p.317.
5. Beardmore, P. and Hull, D., 1967, in: “Refractory Metals and Alloys IV” A.I.M.E. Symposium, Amer. Inst. Min. Met. Eng., New York, p.81.