1. Acim.nidec.com. 2020. Yangquan Coalbed Methane Power Plant. [online] Available at: https://acim.nidec.com/generators/leroy-somer/references/yangquan-cbm-power-plant [Accessed 30 July 2020].
2. Advanced Resources International, Inc., 2006. The Economics of Powder River Basin Coalbed Methane Development. Prepared for: U.S. Department of Energy. [online] Advanced Resources International, Inc. Available at: http://www.adv-res-hou.com/pdf/The%20Economics%20of%20Powder%20River%20Basin%20Coalbed%20Methane%20Development.pdf [Accessed 27 September 2017].
3. ALL Consulting, 2004. Coal Bed Methane Primer. New Source of Natural Gas – Environmental Implications. Montana: U.S. Department of Energy, National Petroleum Technology Office.
4. Balfas, R., 2012. Successful CBM Coring Activity Integrated with Conventional Well Drilling in Sanga-sanga Block, Mahakam Delta, East Kalimantan, Indonesia. In: Indonesian Petroleum Association. Jakarta: Indonesian Petroleum Association.
5. Bank, G., and Kuuskraa, V., 2006. The Economics of Powder River Basin Coalbed Methane Development. Washington D.C.: Advanced Resources International, Inc.