1. H. E. Pattee, WCR Bulletin No. 148, Welding Research Council, New York (1972).
2. R. F. Pabst, Z. Werkstoff. 6 (1) (1975) 17.
3. W. Weibull, Ing. Vetenskaps Akad. Handl. (1939) 153.
4. E. J. Ripling, S. Mostovoy and R. L. Patrick, Mat. Res. Stand. 4 (3) (1964) 129.
5. P. F. Becher and W. L. Newell, J. Mater. Sci. 12 (1977) 90.