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Piper, J. D. A. (1976). “Palaeomagnetic Evidence for a Proterozoic Super-Continent”. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 280 (1298): 469–90. Bibcode: 1976RSPTA.280..469P. doi:10.1098/rsta.1976.0007. JSTOR74572.
Bond, G. C.; Nickeson, P. A.; Kominz, M. A. (1984). “Breakup of a supercontinent between 625 Ma and 555 Ma: new evidence and implications for continental histories”. Earth and Planetary Science Letters70 (2): 325–45. Bibcode: 1984E&PSL..70..325B. doi:10.1016/0012-821X(84)90017-7.
Piper, J. D. A. (1976). “Palaeomagnetic Evidence for a Proterozoic Super-Continent”. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 280 (1298): 469–90. Bibcode: 1976RSPTA.280..469P. doi:10.1098/rsta.1976.0007. JSTOR74572.