1. Natural gas gross withdrawals and production 2013 https://www.eia.gov/dnav/ng/ng_prod_sum_dcu_NUS_a.htm
2. The Allison Unit CO2-ECBM pilot - a reservoir and economic analysis;Reeves;International Coalbed Methane Symposium,2005
3. Reservoir simulation and interpretation of the RECOPOL ECBM pilot in Poland;Wageningen;International Coalbed Methane Symposium,2007
4. Field test of CO sequestration and ECBM in Japan;Ohga;International Coalbed Methane Symposium,2006
5. CO2 storage and enhanced methane productionField testing at Fenn-Big Valley, Alberta, Canada, with application