Iacumin, P., et al. , translators. “Keratin C and N Stable Isotope Ratios of Fossil Cattle Horn from Kerma (Sudan): A Record of Dietary Changes”. Alpine and Mediterranean Quaternary, vol. 14, no. 1, Dec. 2022, pp. 41-46, https://amq.aiqua.it/index.php/amq/article/view/652.