Yin, Leiming (Feb 2020). «Microfossils from the Paleoproterozoic Hutuo Group, Shanxi, North China: Early evidence for eukaryotic metabolism». Precambrian Research342: 105650. Bibcode:2020PreR..342j5650Y. doi:10.1016/j.precamres.2020.105650.
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Yin, Leiming (Feb 2020). «Microfossils from the Paleoproterozoic Hutuo Group, Shanxi, North China: Early evidence for eukaryotic metabolism». Precambrian Research342: 105650. Bibcode:2020PreR..342j5650Y. doi:10.1016/j.precamres.2020.105650.
Cohen, K. M., Finney, S. C., Gibbard, P. L. & Fan, J.-X. (2013; actualizado 2022). «The ICS International Chronostratigraphic Chart». Episodes36. pp. 199-204. Consultado el 30 de diciembre de 2022.