1. U.S. Energy Information Administration, Assumptions to the Annual Energy Outlook 2018: Oil and Gas Supply Module, 2018.
2. U.S. Energy Information Administration, Annual Energy Outlook 2017, 2017.
3. U.S. Energy Information Administration, Annual Energy Outlook 2018 with projections to 2050, 2018. doi: DOE/EIA-0383(2017).
4. U.S. Energy Information Administration, Technically Recoverable Shale Oil and Shale Gas Resources : An Assessment of 137 Shale Formations in 41 Countries Outside the United States, 2013. doi:www.eia.gov/analysis/studies/worldshalegas/.
5. Fractured shale-gas systems;Curtis;Am Assoc Pet Geol Bull,2002