Helm, C., H. Cawthra, R. Cowling, J. De Vynck, C. Marean, R. McCrea, and R. Rust. “Palaeoecology of Giraffe Tracks in Late Pleistocene Aeolianites on the Cape South Coast”. South African Journal of Science, vol. 114, no. 1/2, Jan. 2018, p. 8, doi:10.17159/sajs.2018/20170266.