Tomasello, Michael Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Warneken, F., & Tomasello, M. (2013). The emergence of contingent reciprocity in young children. Journal of Experimental Child Psychology, 116(2), 338-350. doi:10.1016/j.jecp.2013.06.002.