Christopher Tollefsen
(2015). Double effect and two hard cases in medical ethics. American Catholic Philosophical Quarterly, 89 (3), 407-420. https://doi.org/10.5840/acpq20156455.
(2013). Response to Robert Koons and Matthew O'Brien's "Objects of intention: a hylomorphic critique of the new natural law theory". American Catholic Philosophical Quarterly, 87 (4), 751-778. https://doi.org/10.5840/acpq201387455.
(2012). Augustine, Aquinas, and the absolute norm against lying. American Catholic Philosophical Quarterly, 86 (1), 111-134. https://doi.org/10.5840/acpq_2012_6.
(2011). Some questions for philosophical embryology. American Catholic Philosophical Quarterly, 85 (3), 447-464. https://doi.org/10.5840/acpq201185330.
(2009). No problem: a response to Bernard Prusak's "The problem with the problem of the embryo". American Catholic Philosophical Quarterly, 83 (4), 583-591. https://doi.org/10.5840/acpq200983446.
(2004). Sic et non: some disputed questions in reproductive ethics. In G. Khushf (Ed.). Handbook of bioethics (pp. 381-413). Dordrecht: Springer.