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Keith Hyland; Emmanuelle Voisin; Hélène Banoun; Christian Auclair. (1983). Superoxide dismutase assay using alkaline dimethylsulfoxide as superoxide anion-generating system. , 135(2), 280–287. doi:10.1016/0003-2697(83)90684-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research