Hoffman, P.F., D.S. Abbot, Y. Ashkenazy, D.I. Benn, J.J. Brocks, P.A. Cohen, G.M. Cox, et al. (2017) 2017. “Snowball Earth Climate Dynamics and Cryogenian Geology-Geobiology”. Science Advances 3 (11): e1600983. https://doi.org/10.1126/sciadv.1600983.

Maloof, A.C., C.V. Rose, R. Beach, B.M. Samuels, C.C. Calmet, D.H. Erwin, G. Poirier, N. Yao, and F.J. Simons. (2010) 2010. “Possible Animal-Body Fossils in Pre-Marinoan Limestones from South Australia”. Nature Geoscience 3: 653–659. https://doi.org/10.1038/ngeo934.