Kayser, C Max Planck Institute for Biological Cybernetics, Max Planck Society; Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;
http://www.pnas.org/content/pnas/110/5/1959.full.pdf (Publisher version)
Ghazanfar, A., Morrill, R., & Kayser, C. (2013). Monkeys are perceptually tuned to facial expressions that exhibit a theta-like speech rhythm. Proceedings of the National Academy of Sciences of the United States of America, 110(5), 1959-1963. doi:10.1073/pnas.1214956110.