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O’Brien, J. L.; Hamilton, A. R.; Clark, R. G.; Mielke, C. H.; Smith, J. L.; Cooley, J. C.; Rickel, D. G.; Starrett, R. P.; Reilly, D. J.; Lumpkin, N. E.; Hanrahan, R. J.; Hults, W. L. . (2002). -uranium. Physical Review B, 66(6), 064523–. doi:10.1103/PhysRevB.66.064523 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research