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A. Chukwujekwu Okafor; Hari Bhogapurapu. (2006). Design and analysis of adhesively bonded thick composite patch repair of corrosion grind-out and cracks on 2024 T3 clad aluminum aging aircraft structures. , 76(1-2), 138–150. doi:10.1016/j.compstruct.2006.06.020 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research