1. 1) F. B. PICKERING: Iron and Steel, 41 (1968), p.250
2. 4) J. GLEN: JISI, 189 (1958), p.333
3. 5) J. GLEN: JISI, 190 (1958), p.114
4. 6) K. J. IRVINE, J. D. MURRAY, and F. B. PICKERING: In “Structural Probesses in Creep”, ISI (U. K), Spec. Rep. No 70 (1961), p.246
5. 7) J. S. T. Van ASWEGEN, and P. W. K. HONEYCOMBE: Acta. Met., 10 (1962), p.262