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Su, C.; Wang, L.; Chen, M.; Huang, Z.; Lin, X. . (2016). Adsorptive removal of methylene blue by CuO-acid modified sepiolite as effective adsorbent and its regeneration with high-temperature gas stream. Water Science and Technology, 74(4), 844–851. doi:10.2166/wst.2016.261 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research