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Author (up) Title Year Publication Serial Volume Pages
Russon, A.E.; Handayani, D.P.; Kuncoro, P.; Ferisa, A. Orangutan leaf-carrying for nest-building: toward unraveling cultural processes 2007 Animal Cognition 2431 10 189-202
Van Schaik, C. Why are some animals so smart? 2006 Scientific American 2830 294 64-71
Wich, S.A.; de Vries, H. Male monkeys remember which group members have given alarm calls 2006 Proceedings. Biological Sciences / The Royal Society 2816 273 735-740