2DAVID GHILI,TRACY E LOMBARDI,JOHN P MAR- TIN. Fractured shale gas potential in New York[J].Northeastem Geology and Environmental Sciences, 2004, 26(1/2):57-78.
3KUUSKRAA V A. Unconventional natural gas industry: Savior or bridge[C]. EIA Energy Outlook and Modeling Conference, 2006.
4GATENS M. Unconventional gas in Canada: An important new resource [C]. 2005 Energy & Environment Workshop. Calgary: CERI, 2005.
