1. M. Gensamer:The Sorby Centennial Symposium on the History of Metallurgy, C. S. Smith, ed., pp. 59–66, Metallurgical Society Conferences, No. 27, Gordon and Breach Science Publishers, New York, 1965.
2. J. B. Austin:Met. Trans., 1970, vol. 1, pp. 1795–1803.
3. H. M. Howe:The Metallography of Steel and Cast Iron, McGraw-Hill Book Company, New York, 1916.
4. E. H. Gott: Third Ann. Conf. Int. Iron Steel Inst., Tokyo, Japan, 1969,Report of Proceedings, 1970, pp. 102–17.
5. A.V. Wiebel: Yearb. Amer. Iron Steel Inst., 1969, pp. 193–234.