1. I.L. Dillamore and H. Katoh, Met.Sci.J., 1974, J3, 21.
2. H.J. Bunge, Kristall und Technik, 1970, 145.
3. G. Wassermann, Z. Metallkunde, 1963, 54, 61.
4. W.B. Hutchinson, B.J. Duggan and M. Hatherly, “Copper 77”, Met. Soc. in press.
5. B.J. Duggan, M. Hatherly, W.B. Hutchinson and P. Wakefield Met. Sel. J. in press.