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Li, Chengjie; Xiang, Meng; Ye, Lin . (2017). Intercalation structure and highly enhancing tribological performance of monomer casting nylon-6/graphene nano-composites. Composites Part A: Applied Science and Manufacturing, 95(), 274–285. doi:10.1016/j.compositesa.2017.01.013 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research