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«2012 Apocalypse». The Discovery Channel. 2009. Arkivert frå originalen 11. november 2009. Henta 8. november 2009.
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Andrew K. Scherer (2007). «Population structure of the classic period Maya». American Journal of Physical Anthropology132 (3): 367–380. PMID17205548. doi:10.1002/ajpa.20535.
John N. Bahcall; Safi Bahcall (22 August 1985). «The Sun's motion perpendicular to the galactic plane». Nature316 (6030): 706–708. Bibcode:1985Natur.316..706B. doi:10.1038/316706a0.
Dunn, Emily (November 2016). «Reincarnated Religion? The Eschatology of the Church of Almighty God in Comparative Perspective». Studies in World Christianity (på engelsk) 22 (3): 216–233. doi:10.3366/swc.2016.0157.
Makemson 1957, p. 4 Makemson, Maude Worcester (June 1957). «The miscellaneous dates of the Dresden Codex». Publications of the Vassar College Observatory6: i. Bibcode:1957PVasO...6....1M.
John N. Bahcall; Safi Bahcall (22 August 1985). «The Sun's motion perpendicular to the galactic plane». Nature316 (6030): 706–708. Bibcode:1985Natur.316..706B. doi:10.1038/316706a0.
Connor, Steve (17. oktober 2009). «Relax, the end isn't nigh». The Independent (London). Arkivert frå originalen 20. oktober 2009. Henta 20. oktober 2009.
Andrew K. Scherer (2007). «Population structure of the classic period Maya». American Journal of Physical Anthropology132 (3): 367–380. PMID17205548. doi:10.1002/ajpa.20535.
Suat Ling, Chok (20. desember 2012). «Much ado about apocalypse». New Straits Times. Arkivert frå originalen 4. november 2013. Henta 21. desember 2012.
Michael Szpir. «Perturbing the Oort Cloud». American Scientist. The Scientific Research Society. Arkivert frå originalen 21. februar 2017. Henta 25. mars 2008.
«2012 Apocalypse». The Discovery Channel. 2009. Arkivert frå originalen 11. november 2009. Henta 8. november 2009.
Connor, Steve (17. oktober 2009). «Relax, the end isn't nigh». The Independent (London). Arkivert frå originalen 20. oktober 2009. Henta 20. oktober 2009.
Suat Ling, Chok (20. desember 2012). «Much ado about apocalypse». New Straits Times. Arkivert frå originalen 4. november 2013. Henta 21. desember 2012.
Milbrath 1999, p. 4 Milbrath, Susan (1999). Star Gods of the Maya: Astronomy in Art, Folklore, and Calendars. The Linda Schele series in Maya and pre-Columbian studies. Austin: University of Texas Press. ISBN978-0-292-75225-2. OCLC40848420.
See in particular, chapter 6 ("The Great Cycle: Its Projected Beginning"), chapter 7 ("The Great Cycle – Its Projected End") and the Appendix, in Waters 1975, pp. 256–264, 265–271, 285 Waters, Frank (1975). Mexico Mystique: The Coming Sixth World of Consciousness. Chicago, Illinois: Sage Books/Swallow Press. ISBN978-0-8040-0663-7. OCLC1364766.