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Machado, Felipe; Debieux, Pedro; Kaleka, Camila Cohen; Astur, Diego; Peccin, Maria Stella; Cohen, Moisés . (2018). Knee isokinetic performance following anterior cruciate ligament reconstruction: patellar tendon versus hamstrings graft. The Physician and Sportsmedicine, (), 1–6. doi:10.1080/00913847.2018.1418592 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research