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"Guatemala". Cornell Center on the Death Penalty Worldwide. September 24, 2012. Archived from the original on May 18, 2017. Retrieved November 7, 2016.
McCracken, Megan; Moreno, Jen (January 29, 2010). "Comments on the proposed "Death Penalty Procedures," 501 KAR 16:001–16:340"(PDF). University of California, Berkeley – School of Law – Death Penalty Clinic. Archived from the original(letter to Amy V. Barker, Assistant General Counsel, Department of Justice and Public Safety Cabinet, Commonwealth of Kentucky) on August 14, 2011. Retrieved February 25, 2012.
Orders in Pending Cases(PDF), Supreme Court of the United States, September 25, 2007, archived from the original(PDF) on February 3, 2017, retrieved June 27, 2017
07-5439 BAZE V. REES(PDF), Supreme Court of the United States, archived from the original(PDF) on February 2, 2017, retrieved June 27, 2017
Slevin, Peter (October 12, 2009). "Execution Methods Examined". The Washington Post. Archived from the original on June 28, 2011. Retrieved May 2, 2010.