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Chen, Yong; Chen, Hui; Zhu, Minhao; Yang, Tao; Shen, Lin . (2017). Elements loss analysis based on spectral diagnosis in laser-arc hybrid welding of aluminum alloy. International Journal of Modern Physics B, 31(16-19), 1744036–. doi:10.1142/S0217979217440362 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research