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Song, Zhongguo; Liu, Jiangfan; Du, Yongxing; Xi, Xiaoli . (2015). The modeling and simulation of plasma sheath effect on GNSS system. Applied Physics A, 121(3), 1067–1073. doi:10.1007/s00339-015-9131-2 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research