From Citizendium, the Citizens' Compendium
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- Pruetz, J.D. (2007), "Evidence of cave use by savanna chimpanzees (Pan troglodytes verus) at Fongoli, Senegal: implications for thermoregulatory behavior", Primates 48 (4): 316–319, DOI:10.1007/s10329-007-0038-1
- Boesch, C. (2003), "Is culture a golden barrier between human and chimpanzee?", Evolutionary Anthropology 12: 82–91, DOI:10.1002/evan.10106
- Rendell, L. & H. Whitehead (2001), "Culture in whales and dolphins", Behav Brain Sci 24 (2): 309–324, DOI:10.1017/S0140525X0100396X