1. M. Semchyshen, and J.J. Harwood:Refractory Metals and Alloys, TMS, Warrendale, PA, 1961, pp. 357–81.
2. J.B. Clark, R.K. Garrett Jr., T.L. Jungling, R.A. Vandermeer, and C.L. Vold:Metall. Trans. A, 1991, vol. 22A, pp. 22039–48.
3. W.T. Lankford, S.C. Synder, and J.A. Bauscher:Trans. ASME, 1950, vol. 42, pp. 1197–1232.
4. F. Emren, U. Von, Schlippenbach, and K. Lucke:Acta Metall., 1986, vol. 34 (11), pp. 2105–17.
5. C. Pokross:J. Met., 1989, October, pp. 46–49.