Wanger, G., T.C. Onstott, and G. Southam. 2008. “Stars of the Terrestrial Deep Subsurface: A Novel Star-Shaped Bacterial Morphotype from a South African Platinum Mine”. Geobiology 6: 325-30. doi:10.1111/j.1472-4669.2008.00163.x.

Silver, B.J., T.C. Onstott, G. Rose, L.-H. Lin, C. Ralston, B. Sherwood-Lollar, S.M. Pfiffner, T.L. Kieft, and S. McCuddy. 2010. “In Situ Cultivation of Subsurface Microorganisms in a Deep Mafic Sill: Implications for SLiMEs”. Geomicrobiology Journal 27: 329-48. doi:10.1080/01490451003705183.