The Kirlian Technique: Controlling the Wild Cards. The Kirlian effect not only is explainable by natural processes; it also varies according to at least six physical parameters. Arleen J. Watkins and Williams S. Bickel, The Skeptical Inquirer 13:172-184, 1989.
randi.org
"Kirlian photography". An Encyclopedia of Claims, Frauds, and Hoaxes of the Occult and Supernatural. James Randi Educational Foundation. Retrieved 2008-10-14., derived from: *Randi, James (1997). An Encyclopedia of Claims, Frauds, and Hoaxes of the Occult and Supernatural. St. Martin's Griffin. ISBN978-0-312-15119-5.