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Zhang, Chen; Yu, Yan; Chen, Cong; Zeng, Xiaoyan; Gao, Ming . (2020). Suppressing porosity of a laser keyhole welded Al-6Mg alloy via beam oscillation. Journal of Materials Processing Technology, 278(), 116382–. doi:10.1016/j.jmatprotec.2019.116382 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research