Gibson, N. E., L. Wadley, and B. S. Williamson. “Microscopic Residues As Evidence of Hafting on Backed Tools from the 60 000 to 68 000 Year-Old Howiesons Poort Layers of Rose Cottage Cave, South Africa”. Southern African Humanities, vol. 16, Feb. 2021, pp. 1-11, https://sahumanities.org/index.php/sah/article/view/148.