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S. Cortes; E. Reynaga-Delgado; A.M. Sancha; C. Ferreccio. (2011). Boron exposure assessment using drinking water and urine in the North of Chile. , 410-411(none), 96–101. doi:10.1016/j.scitotenv.2011.08.073 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research