1. J. A. Ewing and W. Rosenhain, Proc. Roy. Soc. A 65 (1899) 85.
2. D. McLean, “Grain Boundaries in Metals” (Clarendon Press, Oxford, England, 1957).
3. T. Watanabe, Res Mechanica 11 (1984) 47.
4. T. Watanabe, Res Mechanica, Key Eng. Mater. 171–174 (2000) 237.
5. T. Watanabe, Res Mechanica, Mater. Sci. Forum 408–412 (2002) 39.