‘A Note on an Objection to Determinism', Philosophy, vol. 45 (April 1970), pp. 156-7

'Neil Cooper's Concepts of Morality', Mind, vol. 80 (July 1971), pp. 421-423

'Why Nozick is Not So Easy to Refute', Western Political Quarterly, vol. XXIX (1976), pp. 191-2

'Utility and the Survival Lottery', Philosophy, vol. 52 (April 1977), pp. 218-22

'Can Ethics Be Taught in a Hospital?', Pediatrics, vol. 60 (August 1977), pp. 253-5

'The Fable of the Fox and The Unliberated Animals', Ethics, vol. 88, no. 2 (January 1978), pp. 119-125

'Anglin on the Obligation to Create Extra People', Canadian Journal of Philosophy, vol. 8, no. 3 (September 1978), pp. 583-5

'Regan's Critique of Singer', Analysis, vol. 39, no. 3 (June 1979), pp. 118-9

'Advocacy, Objectivity and The Draize Test', International Journal for the Study of Animal Problems, vol. 1 (1980), pp. 212-3

'Reply to Dr. Harris', Philosophical Books, vol. XXII (1981), pp. 198-200

'How Do we Decide?' Hastings Center Report, vol. 12, no. 3 (June 1982), pp. 9-11

'Sanctity of Life or Quality of Life?', Pediatrics, vol. 72, (1983), pp. 128-9

'A Comment on the Animal Rights Debate', The International Journal of Applied Philosophy, vol. 1, no. 3 (1983), pp. 89-90

'Ng & Singer on Utilitarianism: A Reply', Canadian Journal of Philosophy, vol. XIII, no. 2 (1983), pp. 241-242 (jointly with Y-K. Ng)

'In Reply', Pediatrics, vol. 73 (February 1984), pp. 261-3

'The Moral Status of Embryos: Response', Journal of Medical Ethics, vol. 10, no. 2 (June 1984), pp. 80-81

'Neonatal Intensive Care: How Much, and Who Decides', Medical Journal of Australia, 142 (March 18, 1985), pp. 335-6

'The Expanding Circle: A Reply to Munevar', Explorations in Knowledge, vol. IX, no. 1 (1987), pp. 51-54

'Australian Developments in Reproductive Technology', Hastings Center Report, vol. 18, no. 2 (April/May 1988), p. 4

'Comment on Frey: "Moral Standing, the Value of Lives, and Speciesism"', Between the Species, vol. 4, no. 3 (June 1988), pp. 202-3

'Resolving arguments about the sanctity of life: a response to Long', Journal of Medical Ethics, 14 (1988), pp. 198-9 (with Helga Kuhse)

'Experiments on animals', British Medical Journal, 299 (November 18, 1989), pp. 1238-9

'The significance of animal suffering', Behavioral and Brain Sciences, 13 (1990), pp. 9-12

'Ethics and Animals', Behavioral and Brain Sciences, 13 (1990), pp. 45-49

'An Argument for Utilitarianism: A Defence', Australasian Journal of Philosophy, vol. 68, no. 4 (1990), pp. 448-454 (with Yew-Kwang Ng)

'Viel Wind um Nichts' ('A lot of wind about nothing'), Ethik und Sozialwissenschaften, vol. 2, no. 3 (1990), pp. 411-414 (with Helga Kuhse)

'Speciesism, Morality and Biology', The Psychologist, vol. 4, no. 5 (May 1991), pp. 199-200

'Prolonging Dying is the same as prolonging living - one more response to Long', Journal of Medical Ethics, vol. 17, no. 4 (December 1991), pp. 205-6 (with Helga Kuhse)

'The pervasiveness of species bias', Behavioral and Brain Sciences, vol. 14, no. 4 (1991), pp. 759-760

'How to argue with egg producers', Behavioral and Brain Sciences, vol. 17, no. 4 (1994), p. 749

'Straw men with broken legs: a reply to Per Sandström', Journal of Medical Ethics, vol. 21, no. 2 (1995), p. 89-90

'Euthanasia: Kuhse and Singer respond', Australian Nursing Journal, September 1995, p. 26 (with Helga Kuhse)

'Blind hostility: a response to Russell and Nicoll', Proceedings of the Society for Experimental Biology and Medicine, vol. 211, no. 2 (1996), pp. 139-146

'Double jeopardy, the equal value of lives and the veil of ignorance: a rejoinder to Harris', Journal of Medical Ethics, vol. 22, no. 4 (1996), pp. 204-208 (with John McKie, Helga Kuhse and Jeff Richardson)

'Another peep behind the veil', Journal of Medical Ethics, vol. 22, no. 4 (1996), pp. 216-221 (with John McKie, Helga Kuhse and Jeff Richardson)

'Prenatal Diagnosis', Lahey Clinic Medical Ethics Journal, Spring 2000

'Morte cerebrale ed etica della sacralita della vita', Bioetica, vol. 8, no. 1 (2000), pp. 31-49

'Response to Mark Kuczewski', American Journal of Bioethics, vol. 1, no 3 (2001), pp. 55-6

'Poverty, Facts, and Political Philosophies: Response to "More than Charity"', Ethics and International Affairs, vol. 16, no. 1 (2002), pp. 121-124

'Achieving the Best Outcome: Final Rejoinder', Ethics and International Affairs, vol. 16, no. 1 (2002), pp. 127-128

'The Debate of the Century: A Response', Crux, vol. 2, no. 3 (Autumn 2002), pp. 3, 6

'Ms B and Diane Pretty: A Commentary', Journal of Medical Ethics, vol. 28, no. 4 (August 2002), pp. 234-5

'One World: A Response to my Critics', Analyse & Kritik, vol. 25, no. 2 (December 2003), pp. 285-293

'Ethics and Disability: A Reply to Koch', Journal of Disability Policy Studies, vol 16, no. 2 (Fall  2005), pp. 130-133

'Intuitions, Heuristics, and Utilitarianism', Behavioral and Brain Sciences, vol 28, no. 4 (2005), pp. 560-561

'Ethics and Climate Change: A Commntary on MacCracken, Toman and Gardiner', Environmental Values, 15 (2006), pp. 415-22

'Embryos, stem cells and moral status: a response to George and Lee', EMBO reports, vol. 10, no. 12 (December 2009),  p. 1283 (with Agata Sagan)

'Response to Emilie Dardenne', Revue d'Etudes Benthamiennes, no. 7 (2010)