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Thornalley, D. J. R.; Barker, S.; Broecker, W. S.; Elderfield, H.; McCave, I. N. . (2011). The Deglacial Evolution of North Atlantic Deep Convection. Science, 331(6014), 202–205. doi:10.1126/science.1196812 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research