1. Cloning, Aquinas, and the embryonic person;Ashley;Nat. Catholic Bioethics Quart.,2001
2. Testimony of Ronald Cole-Turner;Cole-Turner,2000
3. Declaration on Procured Abortion (Acta Apostolicae Sedis);Congregation for the Doctrine of the Faith,1974
4. The Gift of Life (Donum Vitae);Congregation for the Doctrine of the Faith,1987
5. Testimony of Father Demetrios Demopulos;Demopulos,2000