1. EIA , Technically Recoverable Shale Oil and Shale Gas Resources , 2013
2. Comparative analysis of hydraulic fracturing wastewater practices in unconventional shale development: Water sourcing, treatment and disposal practices
3. The intensification of the water footprint of hydraulic fracturing
4. EPA , Hydraulic fracturing for oil and gas: impacts from the hydraulic fracturing water cycle on drinking water resources in the United States . Washington, DC , US Environmental Protection Agency , EPA/600/R-16, 2016
5. J. Arthur , B.Bohm and M.Layne , Environmental considerations of modern shale gas development , SPE 2078757, SPE Annual Technical Conference and Exhibition , New Orleans, LA , Oct 7-9, 2009