1. 1) E. T. Turkdogan and L. E. Leake: J.I.S.I., 179 (1955), 39.
2. 2) J. Chipman: J.I.S.I., 180 (1955), 97.
3. 3) F. Neumann and H. Schenck: Arch. Eisenhüttenw., 30 (1959), 477.
4. 4) T. Fuwa and J. Chipman: Trans. Met. Soc. AIME, 215 (1959), 708.
5. 5) M. Ohtani and N. A. Gokcen: Trans. Met. Soc. AIME, 218 (1960), 533.