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Bumberger, Alexander; Koller, Ulrich; Hofbauer, Marcus; Tiefenboeck, Thomas Manfred; Hajdu, Stefan; Windhager, Reinhard; Waldstein, Wenzel . (2019). Ramp lesions are frequently missed in ACL-deficient knees and should be repaired in case of instability. Knee Surgery, Sports Traumatology, Arthroscopy, (), –. doi:10.1007/s00167-019-05521-3 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research