1. Scrutton, R. A., and Roberts, D. G., Inst. geol. Sci. Rep. 70/14, 77 (1971).
2. Scrutton, R. A., Geophys. Jl R. astr. Soc., 27, 259 (1972).
3. Roberts, D. G. Ardus, D. A., and Dearnley, R., Nature phys. Sci., 244, 21 (1973).
4. Bott, M. H. P., Browitt, C. W. A., and Stacey, A. P., Marine geophys. Res., 1, 328 (1971).
5. Bott, M. H. P., Implications of continental drift to the earth sciences, (edit. by Tarling, D. H. and Runcorn, S. K.), 1, 175 (Academic Press, London and New York, 1973).