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Devitt, Brian M.; Damasena, Iswadi . (2019). Editorial Commentary: Chicken or the Egg? The Ligamentum Teres and Degenerative Hip Disease. Arthroscopy: The Journal of Arthroscopic & Related Surgery, 35(1), 89–90. doi:10.1016/j.arthro.2018.09.015 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research