1. Organization of the Petroleum Exporting 2019 Countries World Oil Outlook 2040. https://woo.opec.org/chapter.php?chapterNr=12
2. Assessment of Undiscovered Oil and Gas in the Arctic
3. Realizing the Promise of U.S. Arctic Oil and Gas Resources. http://www.npcarcticpotentialreport.org/pdf/AR_Ex ec_Summary.pdf
4. USGS. Final Report: Oil and Gas Resource Assessment of the Russian Arctic (United States Geological Survey, 2008).