1. Alabama Department of Corrections, Execution Procedures, 2021. Available at https://dpic-cdn.org/production/documents/Alabama-Execution-Protocol-March-2021-with-Spiritual-Advisor-Procedures.pdf.
2. The role of state medical boards in regulating physician participation in executions;Alper;J. Med. Licens. Discip.,2009
3. Opinion 2.06—Capital punishment;American Medical Association (AMA),2000
4. Another Botched U.S. Execution Stokes New Anger Over Painful Punishment;Akkad,2014
5. EU Imposes Strict Controls on “Execution Drug” Exports;BBC News,2011