(with Josef Perner) What is a Perspective Problem? Developmental Issues in Belief Ascription and Dual Identity. In: Facta Philosophica 5(2), 2003, 355-378.

Pretend Play in Early Childhood: The Road Between Mentalism and Behaviorism. In: Michael J. Beran, Johannes L. Brandl, Josef Perner, Joelle Proust (eds.): Foundations of Metacognition. Oxford: Oxford University Press, 2012, 146-166.

(with Frank Esken, Beate Priewasser, and Eva Rafetseder) Young children's protest: what it can tell us about early normative understanding. In: Phenomenology and the Cognitive Sciences 14 (4): 2015, 719-740.

The Paradox of Mirror Self-recognition. In: Phenomenology and the Cognitive Sciences 2016, DOI 10.1007/s11097-016-9486-7.

(with Frank Esken) The problem of understanding social norms and what it would it would take robots to solve it. In: R. Hakli & J. Seibt (ed.): Sociality and Normativity in Human-Robot interaction, Berlin, New York: Springer (in press).