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Elhaj, Murtada A.; Enamul Hossain, M.; Imtiaz, Syed A.; Naterer, Greg F. . (2020). Hysteresis of wettability in porous media: a review. Journal of Petroleum Exploration and Production Technology, 10(5), 1897–1905. doi:10.1007/s13202-020-00872-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research