, 2015, 'Intention, permissibility, and the structure of agency', American Catholic Philosophical Quarterly 89 (3), 461-478.
, 2004, Casuistry, in G. Khushf (ed.), Handbook of bioethics, Dordrecht, Springer, pp. 75-88.
, 2002a, Personal responsibility and freedom in health care: a contemporary natural law perspective, in M. J. . Cherry (ed.), Persons and their bodies, Dordrecht, Springer, pp. 111-141.