Variability in the El Niño – Southern Oscillation Through a Glacial-Interglacial Cycle.

Tudhope, A.W., Chilcott, C.P., McCulloch, M.T., Cook, E.R., Chappell, J., Ellam, R.M., Lea, D.W., Lough, J.M. and Shimmield, G.B. (2001) Variability in the El Niño – Southern Oscillation Through a Glacial-Interglacial Cycle. Science, 291: 1511-1517.
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