1. 1) J. H. Hollomon: Report of 9th Conference, (1952), p. 576.
2. 2) J. C. Fisher: See A. H. Cottrell, Dislocations and Plastic Flow in Crystals (Oxford University Press), p. 55.
3. 3) H. Suzuki: J. Phys. Soc. Japan, 9 (1954), 531.
4. 4) T. Suzuki: Dislocations and Mechanical Properties of Crystals, New York, John Wiley and Sons, p. 215.
5. 5) M. Adams: Acta Met., 6 (1958), 327.