G.  Borgonie, Garcia-Moyano, A., Litthauer, D., Bert, W., Bester, A., van Heerden, E., Moller, C., Erasmus, M., and Onstott, T. C., ?Nematoda from the terrestrial deep subsurface of South Africa?, NatureNature, vol. 474, pp. 79-82, 2011.