* [http://www.livescience.com/41909-new-clues-permian-mass-extinction.html Earth's Greatest Killer Finally Caught. Livescience] {{Webarchive|url=https://web.archive.org/web/20131214075918/http://www.livescience.com/41909-new-clues-permian-mass-extinction.html |date=14. december 2013 }}
* [http://videnskab.dk/miljo-naturvidenskab/jordens-storste-masseudryddelse-var-ikke-alene Jordens største masseudryddelse... Videnskab.dk] {{Webarchive|url=https://web.archive.org/web/20130121125348/http://videnskab.dk/miljo-naturvidenskab/jordens-storste-masseudryddelse-var-ikke-alene |date=21. januar 2013 }}
* [http://palaeo.gly.bris.ac.uk/Palaeofiles/Permian/SiberianTraps.html Siberian Traps] {{Webarchive|url=https://web.archive.org/web/20100811064241/http://palaeo.gly.bris.ac.uk/Palaeofiles/Permian/SiberianTraps.html |date=11. august 2010 }}
* [http://www.ucmp.berkeley.edu/education/events/cowen2a.html Siberian Traps] {{Webarchive|url=https://web.archive.org/web/20131217054059/http://www.ucmp.berkeley.edu/education/events/cowen2a.html |date=17. december 2013 }}
* [http://www.le.ac.uk/gl/ads/SiberianTraps/Index.html The Siberian Traps Large Igneous Province] {{Webarchive|url=https://web.archive.org/web/20201029142712/https://www.le.ac.uk/gl/ads/SiberianTraps/Index.html |date=29. oktober 2020 }}
* [http://dsc.discovery.com/news/2009/02/04/volcano-mass-extinction.html Toxic Gases Caused World's Worst Extinction] {{Webarchive|url=https://web.archive.org/web/20121030003101/http://dsc.discovery.com/news/2009/02/04/volcano-mass-extinction.html |date=30. oktober 2012 }}
* [[UNESCOs Verdensarvsliste]]: [http://whc.unesco.org/en/list/1234 Putoranabjergene] {{Webarchive|url=https://web.archive.org/web/20170701092822/http://whc.unesco.org/en/list/1234 |date= 1. juli 2017 }}, hentet 11. juli 2016 {{en sprog}}
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Geologi