1. Janssens R. Palliative care. Concepts and ethics. Nijmegen: Nijmegen University Press; 2001.
2. Ten Have H, Clark D, editors. The ethics of palliative care. European perspectives. Buckingham, Philadelphia: Open University Press; 2002.
3. Clark D, Hockley J, Ahmedzai S, editors. New themes in palliative care. Buckingham, Philadelphia: Open University Press; 1997.
4. Clark D, Seymour J. Reflections on palliative care. Buckingham, Philadelphia: Open University Press; 1999.
5. Moral problems in palliative care journals;Hermsen;Palliat. Med.,2001