1. Hydraulic Fracturing and Shale Gas Production Technology Impacts and Regulations 2013
2. Technically Recoverable Shale Oil and Shale Gas Resources: An Assessment of 137 Shale Formations in 41 Countries Outside the United States 2013
3. Annual Energy Outlook 2013 with Projection to 2040
4. From Boom to Bust? A Critical Look at US Shale Gas Projections 2013
5. http://keeptapwatersafe.org/global-bans-on-fracking/