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Bear, Jacob; Cheng, Alexander H.-D. . (2010). Modeling Groundwater Flow and Contaminant Transport || Modeling Under Uncertainty. , 10.1007/978-1-4020-6682-5(Chapter 10), 637–693. doi:10.1007/978-1-4020-6682-5_10 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research