1. Pearson, G. W., Pilcher, J. R., Baillie, M. G. L. & Hillam, J. Nature 270, 25 (1977).
2. Suess, H. E. Antiquity 50, 61–63 (1976).
3. Ferguson, C. W., Huber, B. & Suess, H. E. Z. Naturforschg 21a, 1173–1177 (1966).
4. Mook, W. G., Munant, A. V. & Waterbolk, H. T. Proc. 8th Int. Conf. Radiocarbon Dating, Lower Hutt City F27 (1972).
5. Oeschger, H. & Strahm, C. Proc. 9th Int. Conf. Radiocarbon Dating, Los Angeles, La Jolla, (1976).