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C.R. Cánovas; C.G. Hubbard; M. Olías; J.M. Nieto; S. Black; M.L. Coleman. (2008). Hydrochemical variations and contaminant load in the Río Tinto (Spain) during flood events. , 350(1-2), 25–40. doi:10.1016/j.jhydrol.2007.11.022 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research