Redigerer Pythia (avsnitt)

=== Geologiske, kjemiske etc undersøkelser ===
* de Boer, Jelle Zeilinga, John Rigby Hale & Henry A. Spiller, (2000): «The Delphic Oracle: A Multidisciplinary Defense of the Gaseous Vent Theory», ''Clinical Toxicology'' '''40'''(2), s. 189–196.
* de Boer, Jelle Zeilinga; Chandon, Jeffrey P. & Hale, John Rigby (2001): «New Evidence for the Geological Origins of the Ancient Delphic Oracle», ''Geology'' '''29'''(8), s. 707–711.
* de Boer, Jelle Zeilinga, Chandon, Jeffrey P.; Hale, John Rigby & Spiller, Henry A. (august 2003): [http://www.scientificamerican.com/article.cfm?id=questioning-the-delphic-o «Questioning the Delphic Oracle»], ''Scientific American''.
* Etiope, G., Christodoulou, D.; Geraga, M.; Favali, P. & Papatheodorou, G. (2006): «The geological links of the ancient Delphic Oracle (Greece): a reappraisal of natural gas occurrence and origin», ''Geology'', '''34''', s. 821–824.
* Harissis H.V. (2014): [http://muse.jhu.edu/journals/perspectives_in_biology_and_medicine/v057/57.3.harissis.html «A Bittersweet Story: The True Nature of the Laurel of the Oracle of Delphi»], ''Perspectives in Biology and Medicine''. '''57'''(3), s. 295-298.
* Piccardi, Luigi (2000): «Active faulting at Delphi: seismotectonic remarks and a hypothesis for the geological environment of a myth», ''Geology'', '''28''', s. 651–654.
* Piccardi L.; Monti, C.; Tassi, F.; Vaselli, O.; Papanastassiou, D. & Gaki-Papanastassiou, K. (2008): «Scent of a myth: tectonics, geochemistry and geomythology at Delphi (Greece)», ''Journal of the Geological Society'', '''165''', London, s. 5–18.