Barrett, H. Clark Center for Adaptive Behavior and Cognition, Max Planck Institute for Human Development, Max Planck Society;
Barrett, H. C., & Behne, T. (2005). Children's understanding of death as the cessation of agency: a test using sleep versus death. Cognition, 96, 93-108. doi:10.1016/j.cognition.2004.05.004.