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Syed Raza; Asis Kumar. (2009). O0008 MANAGEMENT OF ACUTE HEADACHE IN HOSPITAL SETTING-HOW WELL ARE WE DOING?. , 20(supp-S1), 0–. doi:10.1016/s0953-6205(09)60010-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research