White, TD; Toth, N (1989). "Engis: preparation damage, not ancient cutmarks". Am J Phys Anthropol. 78 (3): 361–7. doi:10.1002/ajpa.1330780305. PMID2929740.
Russell, MD; LeMort, F (1986). "Cutmarks on the Engis 2 calvaria? - Mary D. Russell and Françoise LeMort". Am J Phys Anthropol. 69 (3): 317–23. doi:10.1002/ajpa.1330690304. PMID3518479.
White, TD; Toth, N (1989). "Engis: preparation damage, not ancient cutmarks". Am J Phys Anthropol. 78 (3): 361–7. doi:10.1002/ajpa.1330780305. PMID2929740.
Russell, MD; LeMort, F (1986). "Cutmarks on the Engis 2 calvaria? - Mary D. Russell and Françoise LeMort". Am J Phys Anthropol. 69 (3): 317–23. doi:10.1002/ajpa.1330690304. PMID3518479.