Jonathan O’Neil, Richard W. Carlson, Don Francis, Ross K. Stevenson: Neodymium-142 Evidence for Hadean Mafic Crust. Science. Band 321, 2008, S. 1828, doi:10.1126/science.1161925
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Simon A. Wilde, John W. Valley, William H. Peck, Colin M. Graham: Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago. Nature. Band 409, 2001, S. 175 (PDF 197 kB)