J. A.  Zalasiewicz, Mathers, S. J., Hughes, M. J., Gibbard, P. L., Peglar, S. M., Harland, R., Nicholson, R. A., Boulton, G. S., Cambridge, P., and Wealthall, G. P., ?Stratigraphy and Palaeoenvironments of the Red Crag and Norwich Crag Formations Between Aldeburgh and Sizewell, Suffolk, England?, Philosophical Transactions of the Royal Society B, vol. 322, 1988.