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Ingraffea, Anthony R. and Wells, Martin T. and Santoro, Renee L. and Shonkoff, Seth B.C. (2014) Assessment and risk analysis of casing and cement impairment in oil and gas wells in Pennsylvania, 2000–2012. PNAS, 111 (30). pp. 10955-10960. DOI: https://doi.org/10.1073/pnas.1323422111
Howarth, R.W. and Santoro, R. and Ingraffea, Anthony R. (2011) Methane and the greenhouse-gas footprint of natural gas from shale formations. Climatic Change, 106. pp. 679-690. DOI: 0.1007/s10584-011-0061-5