Pika, Simone Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Pika, S., Liebal, K., & Tomasello, M. (2003). Gestural communication in young gorillas (Gorilla gorilla): Gestural repertoire, learning and use. American Journal of Primatology, 60(3), 95-111. doi:10.1002/ajp.10097.