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A. Aburto; L. Fruchter; C. Pasquier. (1998). Penetration depth, superconducting transition temperature and quenching of κ-(BEDT-TTF)2Cu[N(CN)2]Br. , 303(3-4), 185–190. doi:10.1016/s0921-4534(98)00246-9 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research