, 2010, What does it mean to be a naturalist in the human and social sciences?, in F. Stadler (ed.), The present situation in the philosophy of science, Dordrecht, Springer, pp. 305-311.
, 1994a, Ludwig Wittgenstein and Edmund Husserl, in U. Wessels (ed.), Analyomen 1, Berlin, de Gruyter, pp. 956-966.