1. N. F. Mott and F. R. N. Nabarro, in “Report of a conference on the strength of solids” (The Physical Society, London, 1948) p. 1.
2. H. Suzuki, in “Strength of metals and alloys”, edited by H. J. McQueen (Pergamon, Toronto, 1986) p. 1727.
3. J. Friedel, “Dislocations” (Pergamon, Oxford, 1964) p. 379.
4. R. L. Fleischer, Acta Metall. 11 (1963) 203.
5. R. L. Fleischer and W. R. Hibbard, in “Conference on relation of structure to mechanical properties of metals” (National Physical Laboratories, Teddington, 1964) p. 262.