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Çaha, I.; Alves, A. C.; Rocha, L. A.; Toptan, F. . (2020). A Review on Bio-functionalization of β-Ti Alloys. Journal of Bio- and Tribo-Corrosion, 6(4), 135–. doi:10.1007/s40735-020-00432-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research