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Callary, B.; Rathwell, S.; Young, B. . (2015). Masters Swimmers' Experiences With Coaches: What They Want, What They Need, What They Get. SAGE Open, 5(2), 5/2/2158244015588960–. doi:10.1177/2158244015588960 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research