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Fujita, Tomoyuki; Hasegawa, Hisashi; Horita, Zenji; Langdon, Terence G. . (2001). Diffusion in Ultrafine-Grained Al-Mg Alloys. Defect and Diffusion Forum, 194-199(), 1205–1210. doi:10.4028/www.scientific.net/DDF.194-199.1205 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research