http://www.hungarianhistory.com/lib/sipka.doc
^ http://www.ctie.monash.edu.au/hargrave/tihanyi.html
^ Mandell, Melvin. "Infrared: Jack of all Trades". Popular Electronics 1958 January.
^ Radford, Benjamin (November/December 2010). "Infrared Cameras and Ghost Hunting". Skeptical Inquirer (Committee for Skeptical Inquiry) 34 (5): 26.
^ Radford, Benjamin (November/December 2010). "Ghost-Hunting Mistakes: Science and Pseudoscience in Ghost Investigations". Skeptical Inquirer (Committee for Skeptical Inquiry) 34 (5): 44–46.
^ http://www.ctie.monash.edu.au/hargrave/tihanyi.html
^ Mandell, Melvin. "Infrared: Jack of all Trades". Popular Electronics 1958 January.
^ Radford, Benjamin (November/December 2010). "Infrared Cameras and Ghost Hunting". Skeptical Inquirer (Committee for Skeptical Inquiry) 34 (5): 26.
^ Radford, Benjamin (November/December 2010). "Ghost-Hunting Mistakes: Science and Pseudoscience in Ghost Investigations". Skeptical Inquirer (Committee for Skeptical Inquiry) 34 (5): 44–46.
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