1. P. G. Tsybul’skii, Report at the Gubkin Russian State Oil and Gas University (presentation) (Moscow, 2011) [in Russian].
2. BP Statistical Review of World Energy 2012.
3. BP Statistical Review of World Energy 2015.
4. http://www.interfax.ru/russia/416576. Cited March 25, 2016.
5. S. Cornot-Gandolphe, The Impact of the Development of Shale Gas in the United States on Europe’s Petrochemical Industries (IFRI Centre Energie, 2013).