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Rooney, Alan D.; Strauss, Justin V.; Brandon, Alan D.; Macdonald, Francis A. (2015). “A Cryogenian chronology: Two long-lasting synchronous Neoproterozoic glaciations”. Geology43 (5): 459–462. Bibcode: 2015Geo....43..459R. doi:10.1130/G36511.1.
Stern, R.J.; Avigad, D.; Miller, N.R.; Beyth, M. (2006). “Geological Society of Africa Presidential Review: Evidence for the Snowball Earth Hypothesis in the Arabian-Nubian Shield and the East African Orogen”. Journal of African Earth Sciences44 (1): 1–20. Bibcode: 2006JAfES..44....1S. doi:10.1016/j.jafrearsci.2005.10.003.