“Machines and Moral Reasoning” Philosophy Now March/April, 2009

“Environmental Holism and Nanotechnology” in Nanotechnology & Society Current and Emerging Ethical Issues 2008

“Computers as Surrogate Agents” (with Deborah Johnson), in Information Technology and Moral Philosophy, Cambridge University Press, 2008

“Prospects for a Kantian Machine” IEEE Intelligent Systems, July 2006

“Real Wrongs in Virtual Communities” Ethics and Information Technology 5 (4), Kluwer, 2004