1. Adams v. United States ex rel. McCann, 317 U.S. 269 (1942).
2. Atkins v. Virginia, 536 U.S. 304 (2002).
3. Baumgartner, F. R. (2010). Rates of reversals in North Carolina death penalty. Retrieved from: http://www.unc.edu/~fbaum/Innocence/NC/Baumgartner_NC_Death_Reversals-March-20-2010.pdf .
4. Blume, J. H. (2005). Killing the willing: ‘Volunteers’, suicide and competency. Michigan Law Review, 103(5), 939–1009.
5. Bohm, R. M., Clark, L. J., & Aveni, A. F. (1991). Knowledge and death penalty opinion: A test of the Marshall Hypotheses. Journal of Research in Crime and Delinquency, 28, 360–387.