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Hassanein, M.F.; Kharoob, O.F. . (2014). Shear buckling behavior of tapered bridge girders with steel corrugated webs. Engineering Structures, 74(), 157–169. doi:10.1016/j.engstruct.2014.05.021 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research