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Chen-Lin, Xinyi; Delacrétaz, Luca V.; Hartnoll, Sean A. . (2019). Theory of Diffusive Fluctuations. Physical Review Letters, 122(9), 091602–. doi:10.1103/PhysRevLett.122.091602 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research