^ abOllier, C.D. and Harrop, J.F. (1963). "The caves of Mount Hoyo, Eastern Congo Republics". Bulletin of the National Speleological Society. 25 (2): 73−78.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^Willoughby, P.R. (2009). "From the Middle to the Later Stone Age in Eastern Africa". In Camps, M.; Chauhan, P. (eds.). Sourcebook of Paleolithic Transitions. Methods, Theories, and Interpretations. New York: Springer. pp. 301−314.