Crockford, Catherine Chimpanzees, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Crockford_Chimpanzee_RoySocOpSci_2018.pdf (Publisher version), 660KB
Crockford, C., Gruber, T., & Zuberbühler, K. (2018). Chimpanzee quiet hoo variants differ according to context. Royal Society Open Science, 5: 172066. doi:10.1098/rsos.172066.