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Yan-qiu Li; Kai-xi Li; Guo-hua Sun; Jian-long Wang. (2011). Synthesis and characterization of activated carbon with a high mesoporosity. , 49(11), 3707–0. doi:10.1016/j.carbon.2011.04.032 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research