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Wagner, Matthias W.; Poretti, Andrea; Huisman, Thierry A. G. M.; Bosemani, Thangamadhan . (2015). Conventional and advanced (DTI/SWI) neuroimaging findings in pediatric oligodendroglioma. Child's Nervous System, 31(6), 885–891. doi:10.1007/s00381-015-2684-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research