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Papageorgiou, Dimitrios G.; Kinloch, Ian A.; Young, Robert J. . (2017). Mechanical properties of graphene and graphene-based nanocomposites. Progress in Materials Science, 90(), 75–127. doi:10.1016/j.pmatsci.2017.07.004 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research