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Yi, Baojun; Zhang, Liqi; Mao, Zhihui; Huang, Fang; Zheng, Chuguang . (2014). Effect of the particle size on combustion characteristics of pulverized coal in an O2/CO2 atmosphere. Fuel Processing Technology, 128(), 17–27. doi:10.1016/j.fuproc.2014.06.025 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research