1. A Technical and Economic Study of Completion Techniques in Five Emerging US Gas Shale Plays;Agrawal,2009
2. Airhart, M. 2007. Barnett Boom Ignites Hunt for Unconventional Gas Resources. Jackson School of Geosciences news (15 January 2007), http://www.jsg.utexas.edu/news/2007/01/barnett-boom-ignites-hunt-for-unconventional-gas-resources/.
3. Production and Outcrop/Reservoir Characteristics of the Woodford Shale in South-Central and Southeast Oklahoma. Search and Discovery article no. 10137 (posted 4 October 2007);Andrews,2007
4. Hydraulic Fracturing Considerations for Natural Gas Wells of the Marcellus Shale;Arthur,2008