Wendt, W. E. (1976). "'Art Mobilier' from the Apollo 11 Cave, South West Africa: Africa's Oldest Dated Works of Art". The South African Archaeological Bulletin. 31 (121/122): 5. doi:10.2307/3888265.
Rifkin, Riaan F.; Prinsloo, Linda C.; Dayet, Laure; Haaland, Magnus M.; Henshilwood, Christopher S.; Diz, Enrique Lozano; Moyo, Stanley; Vogelsang, Ralf; Kambombo, Fousy (2016). "Characterising pigments on 30 000-year-old portable art from Apollo 11 Cave, Karas Region, southern Namibia". Journal of Archaeological Science: Reports. 5: 336–347. doi:10.1016/j.jasrep.2015.11.028. hdl:2263/59458.
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Rifkin, Riaan F.; Prinsloo, Linda C.; Dayet, Laure; Haaland, Magnus M.; Henshilwood, Christopher S.; Diz, Enrique Lozano; Moyo, Stanley; Vogelsang, Ralf; Kambombo, Fousy (2016). "Characterising pigments on 30 000-year-old portable art from Apollo 11 Cave, Karas Region, southern Namibia". Journal of Archaeological Science: Reports. 5: 336–347. doi:10.1016/j.jasrep.2015.11.028. hdl:2263/59458.