Perner, Josef MPI for Psychological Research (Munich, -2003), The Prior Institutes, Max Planck Institute for Human Cognitive and Brain Sciences, Max Planck Society;
Davies, Graham Max Planck Society;
Perner, J., & Davies, G. (1991). Understanding the mind as an active information processor: Do young children have a "copy theory of mind"? Cognition, 39(1), 51-69.