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Macdonald, E. C. A.; Cauchi, P.; Kemp, E. G. . (2011). Proton beam therapy for the treatment of uveal melanoma in Scotland. British Journal of Ophthalmology, 95(12), 1691–1695. doi:10.1136/bjo.2010.195594 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research