Borgonie, G., B. Linage-Alvarez, A.O. Ojo, S.O.C. Mundle, L.B. Freese, C. Van Rooyen, O. Kuloyo, et al. 2015. “Eukaryotic Opportunists Dominate the Deep-Subsurface Biosphere in South Africa”. Nature Communications 6. doi:10.1038/ncomms9952. Reference Link
Li, L., S. Wei, Sherwood Lollar, B. Wing, T.H. Bui, S. Ono, M.C.Y. Lau Vetter, et al. 2022. “In Situ Oxidation of Sulfide Minerals Supports Widespread Sulfate Reducing Bacteria in the Deep Subsurface of the Witwatersrand Basin (South Africa): Insights from Multiple Sulfur and Oxygen Isotopes”. Earth and Planetary Science Letters 577. doi:10.1016/j.epsl.2021.117247. Reference Link