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Wang, Shufang; Zou, Caineng; Dong, Dazhong; Wang, Yuman; Li, Xinjing; Huang, Jinliang; Guan, Quanzhong . (2015). Multiple controls on the paleoenvironment of the Early Cambrian marine black shales in the Sichuan Basin, SW China: Geochemical and organic carbon isotopic evidence. Marine and Petroleum Geology, 66(), 660–672. doi:10.1016/j.marpetgeo.2015.07.009 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research