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Cotten, A; Jacobson, J; Brossmann, J; Pedowitz, R; Haghighi, P; Trudell, D; Resnick, D . (1997). Collateral ligaments of the elbow: conventional MR imaging and MR arthrography with coronal oblique plane and elbow flexion.. Radiology, 204(3), 806–812. doi:10.1148/radiology.204.3.9280264 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research