Bacaan lanjutan Kriogen (geologi)

"Cryogenian Period". GeoWhen Database. Diarkibkan daripada yang asal pada December 2, 2005. Dicapai pada January 5, 2006.
James G. Ogg (2004). "Status on Divisions of the International Geologic Time Scale". Lethaia. 37 (2): 183–199. doi:10.1080/00241160410006492.
Brain, C. K.; Prave, A. R.; Hoffmann, K. H.; Fallick, A. E.; Herd, D. A.; Sturrock, C.; Young, I.; Condon, D. J.; Allison, S. G. (2012). "The first animals: ca. 760-million-year-old sponge-like fossils from Namibia" (PDF). South African Journal of Science. 108: 1–8. doi:10.4102/sajs.v108i1/2.658.
Hoffman, Paul F.; Abbot, Dorian S.; dll. (November 8, 2017). "Snowball Earth climate dynamics and Cryogenian geology-geobiology". Science Advances. American Association for the Advancement of Science. 3 (11): e1600983. Bibcode:2017SciA....3E0983H. doi:10.1126/sciadv.1600983. PMC 5677351. PMID 29134193. S2CID 1465316.

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