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Chang-Ping Yu; Kung-Hui Chu. (2009). Occurrence of pharmaceuticals and personal care products along the West Prong Little Pigeon River in east Tennessee, USA. , 75(10), 0–1286. doi:10.1016/j.chemosphere.2009.03.043 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research