1. Forecasting world natural gas supply;Al-Fattah;Journal of Petroleum Technology,2000
2. Worldwide petroleum-liquid supply and demand;Al-Jarri;Journal of Petroleum Technology,1997
3. Aluko, N., 2001. Coalbed methane extraction and utilisation. Technology Status Report 016, Department of Trade and Industry DTI website 〈www.dti.gov.uk/files9298.pdf〉 (30.08.07).
4. Benneche, J., 2007. Natural gas projections from EIA and six others. In: EIA Energy Outlook, Modelling and Data Conference.
5. Methodology of coalbed methane resource assessment;Boyer;International Journal of Coal Geology,1998