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Zakirov, T. R.; Galeev, A. A.; Khramchenkov, M. G. . (2018). Pore-Scale Investigation of Two-Phase Flows in Three-Dimensional Digital Models of Natural Sandstones. Fluid Dynamics, 53(5), 654–669. doi:10.1134/s0015462818050087 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research