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Xue, Weihai; Gao, Siyang; Duan, Deli; Wang, Lu; Liu, Yang; Li, Shu . (2016). Study on the High-Speed Rubbing Wear Behavior Between Ti6Al4V Blade and Nickel–Graphite Abradable Seal Coating. Journal of Tribology, 139(2), 021604–. doi:10.1115/1.4033454 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research