1. 1) G. B. KOHUT : Trans. ASME J. Tribol. (1975)10, p. 316
2. 7) D. I. ROBERTS : Alloy 800 (1978), p. 403 [North-Holland Publishing Company]
3. 8) A. TAVASSOLI and G. COLOMBE : Metall, Trans. A, 8 (1977), p. 1577
4. 10) D. MCLEAN : Grain Boundaries in Metals (1957), p. 329 [Oxford University Press]