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Nguyen, Cuong T.; Nguyen, Chi T.; Bui, Ha H.; Nguyen, Giang D.; Fukagawa, Ryoichi . (2017). A new SPH-based approach to simulation of granular flows using viscous damping and stress regularisation. Landslides, 14(1), 69–81. doi:10.1007/s10346-016-0681-y 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research