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G.W. Critchlow; D.M. Brewis; D.C. Emmony; C.A. Cottam. (1995). Initial investigation into the effectiveness of CO2-laser treatment of aluminium for adhesive bonding. , 15(4), 233–236. doi:10.1016/0143-7496(96)83704-3 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research