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Gibson, L.; Lynam, A. J.; Bradshaw, C. J. A.; He, F.; Bickford, D. P.; Woodruff, D. S.; Bumrungsri, S.; Laurance, W. F. . (2013). Near-Complete Extinction of Native Small Mammal Fauna 25 Years After Forest Fragmentation. Science, 341(6153), 1508–1510. doi:10.1126/science.1240495 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research