Barker, S, Starr, A, van der Lubbe, J, Doughty, A, Knorr, G, Conn, S, Lordsmith, S, Owen, L, Nederbragt, A, Hemming, S, Hall, I & Levay, L 2022, ' Persistent influence of precession on northern ice sheet variability since the early Pleistocene ', Science, vol. 376, no. 6596, eabm4033, pp. 961–967 . https://doi.org/10.1126/science.abm4033 Science, 376(6596):eabm4033. American Association for the Advancement of Science