1. Glossary of Geology;Jackson,2011
2. Technically Recoverable Shale Oil and Shale Gas Resources: An Assessment of 137 Shale Formations in 41 Countries Outside the United Stateshttp://www.actu-environnement.com/media/pdf/news-23433-rapport-aie.pdf
3. A Retrospective Review of Shale Gas Development in the United States: What Led to the Boom?http://www.rff.org/files/sharepoint/WorkImages/Download/RFF-DP-13-12.pdf
4. BP Statistical Review of World Energy 2016http://www.bp.com/statisticalreview
5. Bypassing Russia: Nabucco project and its implications for the European gas security