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Xiaolin Li;Kefu Liu;Liuyang Xiong;Lihua Tang;. (2021). Development and validation of a piecewise linear nonlinear energy sink for vibration suppression and energy harvesting . Journal of Sound and Vibration, (), –. doi:10.1016/j.jsv.2021.116104 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research