Pollok, Bettina MPI for Psychological Research (Munich, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Pollok, B., Prior, H., & Güntürkün, O. (2000). Development of object permanence in food-storing magpies (Pica pica). Journal of Comparative Psychology, 114(2), 148-157.