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Legare, M.-A.; Courtemanche, M.-A.; Rochette, E.; Fontaine, F.-G. . (2015). Metal-free catalytic C-H bond activation and borylation of heteroarenes. Science, 349(6247), 513–516. doi:10.1126/science.aab3591 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research