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Xi, Kelai; Cao, Yingchang; Jahren, Jens; Zhu, Rukai; Bjørlykke, Knut; Zhang, Xiangxiang; Cai, Laixing; Hellevang, Helge . (2015). Quartz cement and its origin in tight sandstone reservoirs of the Cretaceous Quantou formation in the southern Songliao basin, China. Marine and Petroleum Geology, (), S0264817215300386–. doi:10.1016/j.marpetgeo.2015.07.017 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research