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XIE, Huan-jun; CHENG, Ying-liang; LI, Shao-xian; CAO, Jin-hui; CAO, Li . (2017). Wear and corrosion resistant coatings on surface of cast A356 aluminum alloy by plasma electrolytic oxidation in moderately concentrated aluminate electrolytes. Transactions of Nonferrous Metals Society of China, 27(2), 336–351. doi:10.1016/S1003-6326(17)60038-4 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research