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Jurewicz, K.; Frackowiak, E.; Béguin, F. . (2001). Enhancement of Reversible Hydrogen Capacity into Activated Carbon through Water Electrolysis. Electrochemical and Solid-State Letters, 4(3), A27–. doi:10.1149/1.1346896 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research