1. 3) G, BERNARD, J. P. BIRAT, B. CONSEIL, and J. C. HUMBERT : Rev. Met., 75 (1978), p. 467
2. 6) O. D. SHERBY : Met, Eng. Quarterly, 2 (1962), p. 2
3. 7) C. G. CARLSSON : Jernkont. Ann., 148 (1964), p. 152
4. 12) B. MINTZ and J. H. ARROWSMITH : Metals Technol., 6 (1979), p. 25