H. G. Nami, P. de la Peña, C. A. Vásquez, J. Feathers, and S. Wurz, “Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa”, S. Afr. J. Sci., vol. 112, no. 11/12, p. 12, Nov. 2016.