SCIENCE & TECHNOLOGY PROGRESS AND POLICY  2017, Vol. 34 Issue (9): 127-131    DOI: 10.6049/kjjbydc.2017GC0084
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Study on Coal Enterprises Transformation Strategy Based on Barriers to Entry and Exit Analysis
Wang Linxiu,Guo Jin
1.Energy Saving and Construction Technology,China University of Mining and Technology,Xuzhou 221116,China