1. Annas, G., A. Caplan, and S. Elias. 1996. The politics of human-embryo research – Avoiding ethical gridlock. The New England Journal of Medicine 334: 1329–1332.
2. Benn, S.I. 1973. Abortion, infanticide, and respect for persons. In The problem of abortion, ed. Feinberg Joel, 92–103. Belmont: Wadsworth.
3. Bok, H., K.E. Schill, and R.R. Faden. 2004. Justice, ethnicity, and stem-cell banks. Lancet 364(9429): 118–121.
4. Burtchaell, J.T. 1989. The use of aborted fetal tissue in research: A rebuttal. IRB: A Review of Human Subjects Research 11(2): 9–12.
5. Curzer, H. 2004. The Ethics of Embryonic Stem Cell Research 29(5): 533–562.