1. J. Jackson, P. Frost, A. Loonam, L. Eastwood and C. Lorig, Trans. AIME 185 (1949) 149.
2. R. S. Busk, D. L. Leman and J. J. Casey, ibid 188 (1950) 945.
3. P. Frost, J. Kura and L. Eastwood, ibid 188 (1950) 1277.
4. W. Jones and G. Hogg, J. Inst. Metals 85 (1956?57) 255.
5. G. V. Raynor, ?The physical metallurgy of magnesium and its alloys? (Pergamon Press, 1959) Ch. 8.