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Jing Chen-Roetling; Wenpei Liu; Raymond F. Regan. (2011). Iron accumulation and neurotoxicity in cortical cultures treated with holotransferrin. , 51(11), 1966–1974. doi:10.1016/j.freeradbiomed.2011.08.021 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research