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Dong, Jiahao; Liu, Yuping; Xu, Qian; Wang, Yinlong; Wang, Sihui . (2019). Surface parametric instability of star-shaped oscillating liquid drops. Physics of Fluids, 31(8), 087104–. doi:10.1063/1.5112007 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research