, 2020, Becoming oneself: on the individuality of aging, in M. Schweda, M. Coors & C. Bozzaro (eds.), Aging and human nature, Dordrecht, Springer, pp. 13-25.
with Guidi, L. (eds) , 2020, Phenomenology as performative exercise, Brill, Leiden.
, 2016, Aging as becoming oneself: a philosophical ethics of late life, in G. Scarre (ed.), The Palgrave handbook of the philosophy of aging, Dordrecht, Springer, pp. 347-364.
, 2011a, 20. Jahrhundert und Gegenwart, in P. H. Breitenstein & J. Rohbeck (Hrsg.), Philosophie, Stuttgart, Metzler, pp. 103-128.
, 2011b, Anthropologie, in P. H. Breitenstein & J. Rohbeck (Hrsg.), Philosophie, Stuttgart, Metzler, pp. 323-334.
, 2011c, 'Der Status der Philosophie in hochschuldidaktischer Perspektive', Deutsches Jahrbuch Philosophie 2, 1439-1449.
with Rohbeck, J. , 2011, Denkrichtungen und Methoden, in P. H. Breitenstein & J. Rohbeck (Hrsg.), Philosophie, Stuttgart, Metzler, pp. 409-419.
, 2004, 'Practical certainty: beyond dogmatism and relativism (remarks on the negativity and autonomy of language in Wittgenstein)', Graduate Faculty Philosophy Journal 25 (1), 31-43.
(ed) , 2001, Martin Heidegger. Sein und Zeit, Akademie Verlag, Berlin.
, 1995a, 'Negativity and ethics', Graduate Faculty Philosophy Journal 18 (2), 127-138.