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Li, Fenqiang; Mo, Jianhua; Li, Jianjun; Huang, Liang; Fan, Wei; Fang, Jinxiu . (2014). Effects of Deformation Rate on Ductility of Ti-6Al-4V Material. Procedia Engineering, 81(), 754–759. doi:10.1016/j.proeng.2014.10.072 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research