Pika, Simone Humboldt Forschungsgruppe Pika, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Liebal, K., & Pika, S. (2012). Where next? In S. Pika, & K. Liebal (Eds.), Developments in primate gesture research (pp. 241-252). Amsterdam: John Benjamins Publishing Company.