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. (1998). 98/01834 X-ray scattering analysis of the average polycyclic aromatic unit in Argonne Premium Coal 401 : Wertz, D. L. Fuel, 1988 (Pub. 1997), 77, (1/2), 43–53. , 39(3), 169–0. doi:10.1016/s0140-6701(98)80043-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research