1. President's Council on Bioethics. 2005.White Paper: Alternate Sources of Human Pluripotent Stem Cells. Washington, D.C.: President's Council on Bioethics.
2. Altered embryos offered as solution to stem-cell rift
3. W. Hurlbut. 2004. Transcript, Session 6: Seeking Morally Unproblematic Sources of Human Embryonic Stem Cells. Washington, D.C. Available at http://www.bioethics.gov/transcripts/dec04/session6.html [Accessed 11 November 2006]: 1.
4. R.A. Charo. 2001. Every Cell is Sacred: Logical Consequences of the Argument from Potential in the Age of Cloning. InCloning and the Future of Human Embryo Research. P. Lauritzen, ed. Oxford: Oxford University Press: 82-92.
5. Do Potential People Have Moral Rights?