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Galli, M. M.; Scott, R. T.; Bussewitz, B. W.; Hyer, C. F. . (2014). A Retrospective Comparison of Cost and Efficiency of the Medial Double and Dual Incision Triple Arthrodeses. Foot & Ankle Specialist, 7(1), 32–36. doi:10.1177/1938640013509669 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research