1. E. L. Robinson:Trans. ANS, 1952, vol. 74, p. 777.
2. A. J. Lovell and J. J. Holmes:Trans. ANS, 1972, vol. 15–2, p. 735.
3. N. E. Hinkle: ASTM STP 341, 1963, p. 344.
4. J. A. Williams and J. W. Carter: ASTM STP 426, 1968, p. 149.
5. E. R. Gilbert and N. E. Harding: ASTM STP 457, 1969, p. 17.