1. Palme, H. & O’Neill, H. S. in The Mantle and Core (ed. Carlson, R. W.) 1–38 (Treatise on Geochemistry 2, Elsevier, 2003)
2. Galer, S. J. G. & Goldstein, S. L. in Earth Processes: Reading the Isotope Code (eds Basu, A. & Hart, S.) 75–98 (American Geophysical Union, 1996)
3. Hofmann, A. W. in The Mantle and Core (ed. Carlson, R. W.) 61–101 (Treatise on Geochemistry 2, Elsevier, 2003)
4. Allègre, C. J., Manhès, G. & Göpel, C. The major differentiation of the Earth at ∼ 4.45 Ga. Earth Planet. Sci. Lett. 267, 386–398 (2008)
5. Oversby, V. M. & Ringwood, A. E. Time of formation of the Earth’s core. Nature 234, 463–465 (1971)