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Jones, B.; Luth, R. W. . (2003). Temporal Evolution of Tertiary Dolostones on Grand Cayman as Determined by 87Sr/86Sr. Journal of Sedimentary Research, 73(2), 187–205. doi:10.1306/091602730187 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research