Hardus M.E. et al. 2012. Behavioral, Ecological, and Evolutionary Aspects of Meat-Eating by Sumatran Orangutans (Pongo abelii). International Journal of Primatology. doi:10.1007/s10764-011-9574-zPMID22467998
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Hardus M.E. et al. 2012. Behavioral, Ecological, and Evolutionary Aspects of Meat-Eating by Sumatran Orangutans (Pongo abelii). International Journal of Primatology. doi:10.1007/s10764-011-9574-zPMID22467998