Tomasello, Michael Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Tomasello, M. (2007). If They're So Good at Grammar, Then Why Don't They Talk? Hints From Apes' and Humans' Use of Gestures. Language Learning and Development, 3(2), 133-156. doi:10.1080/15475440701225451.