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Kosuge, D.; Yamada, N.; Azegami, S.; Achan, P.; Ramachandran, M. . (2013). Management of developmental dysplasia of the hip in young adults: Current concepts. The Bone & Joint Journal, 95-B(6), 732–737. doi:10.1302/0301-620X.95B6.31286 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research