1. C. E. Sims, Trans. AIME 215 (1959) 367.
2. A. J. Baker, F. J. Lauta and R. P. Wei, ASTM STP number 370 (American Society for the Testing of Materials, Philadelphia, 1965) p. 3.
3. A. J. Birkle, R. P. Wei and G. E. Pellissier, Trans. ASM 59 (1966) 981.
4. J. M. Krafft, Appl. Mater. Res. 3 (1964) 88.
5. W. A. Spitzig, ASTM STP number 453 (American Society for the Testing of Materials, Philadelphia, 1969) p. 90.