Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Special Publications, Geological Society of London190 (1): 205–221. doi:10.1144/GSL.SP.2001.190.01.14. Bibcode: 2001GSLSP.190..205D.
Shields, Graham A.; Strachan, Robin A.; Porter, Susannah M.; Halverson, Galen P.; Macdonald, Francis A.; Plumb, Kenneth A.; de Alvarenga, Carlos J.; Banerjee, Dhiraj M. et al. (2022). "A template for an improved rock-based subdivision of the pre-Cryogenian timescale" (in en). Journal of the Geological Society179 (1): jgs2020–222. doi:10.1144/jgs2020-222. பன்னாட்டுத் தர தொடர் எண்:0016-7649. Bibcode: 2022JGSoc.179..222S.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Special Publications, Geological Society of London190 (1): 205–221. doi:10.1144/GSL.SP.2001.190.01.14. Bibcode: 2001GSLSP.190..205D.
Shields, Graham A.; Strachan, Robin A.; Porter, Susannah M.; Halverson, Galen P.; Macdonald, Francis A.; Plumb, Kenneth A.; de Alvarenga, Carlos J.; Banerjee, Dhiraj M. et al. (2022). "A template for an improved rock-based subdivision of the pre-Cryogenian timescale" (in en). Journal of the Geological Society179 (1): jgs2020–222. doi:10.1144/jgs2020-222. பன்னாட்டுத் தர தொடர் எண்:0016-7649. Bibcode: 2022JGSoc.179..222S.
Shields, Graham A.; Strachan, Robin A.; Porter, Susannah M.; Halverson, Galen P.; Macdonald, Francis A.; Plumb, Kenneth A.; de Alvarenga, Carlos J.; Banerjee, Dhiraj M. et al. (2022). "A template for an improved rock-based subdivision of the pre-Cryogenian timescale" (in en). Journal of the Geological Society179 (1): jgs2020–222. doi:10.1144/jgs2020-222. பன்னாட்டுத் தர தொடர் எண்:0016-7649. Bibcode: 2022JGSoc.179..222S.