1. Guo Jianting (Kuo Chien Ting), Chu Yao Hsiao, and Shih Chang Hsu:Acta Metallurgica Sinica. 1974, vol. 10, p. 81.
2. J. F. Radavich and W. H. Couts:Trans. ASM, 1961, vol. 54, p. 591.
3. ST. Wlodek:Trans. ASM, 1964, vol. 57, p. 110.
4. J. F. Radavich and W. H. Couts:Rev. High Temp. Mater., 1971, vol. I, p. 55.
5. L.J. Huetter and H.H. Stadelmaier:Acta Metall., 1958, vol. 6, p. 367.