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J. Jakobsson; H. Zetterberg; K. Blennow; C.J. Ekman; A.G.M. Johansson; M. Landén. (2012). P.2.e.013 Exploratory analysis of biomarkers in the cerebrospinal fluid of bipolar patients. , 22(supp-S2), –. doi:10.1016/s0924-977x(12)70429-7 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research