1. Chen Z H, Zhang N M, Zhang S L, et al. 1989. The time and spatial evlotion of sedimentary systems and coal accumulation center in Late Palaezoic coal-bearing measures on the eastern margin of Ordos Basin (in Chinese). Earth Sci—J Chin Univ Geosci, 14: 357–366
2. Dai J X, Qi H F, Song Y, et al. 1986. Composition, carbon isotope type and origin of coal gas in China (in Chinese). Sci China Ser B-Chem, 12: 1317–1326
3. Gui X Z. 1993. Coal Accumulating and Coal Resource Evaluation of Paleozoic Coal in Hedong Coalfield (in Chinese). Taiyuan: Shanxi Science and Technology Publishing House. 223
4. Hu G Y, Liu S S, Li J M, et al. 2001. Origin of coal gas in Jincheng area of Qinshui Basin (in Chinese). Oil Gas Geol, 22: 319–321
5. Jie M X. 2010. Prospects in coalbed methane gas exploration and development in the eastern Ordos Basin (in Chinese). Nat Gas Ind, 30: 1–6