, 2005, Innocence, genocide, and suicide bombings, in J. K. Roth (ed.), Genocide and human rights, Basingstoke, Palgrave Macmillan, pp. 181-191.
, 1987a, 'A tribute', Synthese 72 (1), 1-4.
, 1987b, 'Friendship', Synthese 72 (2), 217-236.
, 1985, Love and morality: the possibility of altruism, in J. H. Fetzer (ed.), Sociobiology and epistemology, Dordrecht, Springer, pp. 115-129.
, 1979a, 'Capitalism versus Marx's communism', Studies in East European Thought 20 (1), 67-79.