Stevens, Jeffrey R. Center for Adaptive Behavior and Cognition, Max Planck Institute for Human Development, Max Planck Society;
Stevens, J. R., Wood, J. N., & Hauser, M. D. (2007). When quantity trumps number: Discrimination experiments in cotton-top tamarins (Saguinus oedipus) and common marmosets (Callithrix jacchus). Animal Cognition, 10(4), 429-437. doi:10.1007/s10071-007-0081-8.