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Wu, Binglan; Song, Juntao; Zhou, Jiaojiao; Jiang, Hua . (2016). Disorder effects in topological states: Brief review of the recent developments. Chinese Physics B, 25(11), 117311–. doi:10.1088/1674-1056/25/11/117311 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research