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Zhou, Shuang; You, Lu; Zhou, Hailin; Pu, Yong; Gui, Zhigang; Wang, Junling . (2021). Van der Waals layered ferroelectric CuInP2S6: Physical properties and device applications. Frontiers of Physics, 16(1), 13301–. doi:10.1007/s11467-020-0986-0 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research