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Ismail, M.S.; Purbolaksono, J.; Andriyana, A.; Tan, C.J.; Muhammad, N.; Liew, H.L. . (2015). The use of initial imperfection approach in design process and buckling failure evaluation of axially compressed composite cylindrical shells. Engineering Failure Analysis, 51(), 20–28. doi:10.1016/j.engfailanal.2015.02.017 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research