- The Right to Die with Dignity: An Argument in Ethics, Medicine, and Law
- Speech, Media and Ethics: The Limits of Free Expression
- Medical Ethics at the Dawn of the 21st Century (Annals of the New York Academy of Sciences)
- The Scope of Tolerance: Studies on the Costs of Free Expression and Freedom of the Press (Extremism and Democracy)
- Euthanasia in the Netherlands: The Policy and Practice of Mercy Killing